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210010121112221 = 1712353536536013
BaseRepresentation
bin101111110000000011001010…
…101010110000101010011101
31000112120202211102112002020222
4233300003022222300222131
5210011301212001042341
62022353152345051125
762143505402006663
oct5760031252605235
91015522742462228
10210010121112221
1160a08879462821
121b679450786aa5
139024b3c22aab1
1439c0789000c33
151942ca281544b
hexbf00caab0a9d

210010121112221 has 4 divisors (see below), whose sum is σ = 222363657648252. Its totient is φ = 197656584576192.

The previous prime is 210010121112199. The next prime is 210010121112227. The reversal of 210010121112221 is 122211121010012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59091721648996 + 150918399463225 = 7687114^2 + 12284885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-210010121112221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 12353536536013 = 210010121112221 / (2 + 1 + 0 + 0 + 1 + 0 + 1 + 2 + 1 + 1 + 1 + 2 + 2 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210010121112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210010121112227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6176768267990 + ... + 6176768268023.

It is an arithmetic number, because the mean of its divisors is an integer number (55590914412063).

Almost surely, 2210010121112221 is an apocalyptic number.

It is an amenable number.

210010121112221 is a deficient number, since it is larger than the sum of its proper divisors (12353536536031).

210010121112221 is a wasteful number, since it uses less digits than its factorization.

210010121112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12353536536030.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210010121112221 its reverse (122211121010012), we get a palindrome (332221242122233).

The spelling of 210010121112221 in words is "two hundred ten trillion, ten billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty-one".

Divisors: 1 17 12353536536013 210010121112221