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21202122201011 = 171247183658883
BaseRepresentation
bin1001101001000100000001…
…11101100101011110110011
32210001220101100110121010122
410310202000331211132303
510234333421240413021
6113032042004520455
74315542232105613
oct464420075453663
983056340417118
1021202122201011
116834851276164
1224651439b012b
13baa47546078b
1453428c570a43
1526b7b1021bab
hex134880f657b3

21202122201011 has 4 divisors (see below), whose sum is σ = 22449305859912. Its totient is φ = 19954938542112.

The previous prime is 21202122200981. The next prime is 21202122201041. The reversal of 21202122201011 is 11010222120212.

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

It is an interprime number because it is at equal distance from previous prime (21202122200981) and next prime (21202122201041).

It is a cyclic number.

It is not a de Polignac number, because 21202122201011 - 214 = 21202122184627 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: 1247183658883 = 21202122201011 / (2 + 1 + 2 + 0 + 2 + 1 + 2 + 2 + 2 + 0 + 1 + 0 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202122201041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623591829425 + ... + 623591829458.

It is an arithmetic number, because the mean of its divisors is an integer number (5612326464978).

Almost surely, 221202122201011 is an apocalyptic number.

21202122201011 is a deficient number, since it is larger than the sum of its proper divisors (1247183658901).

21202122201011 is a wasteful number, since it uses less digits than its factorization.

21202122201011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247183658900.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21202122201011 its reverse (11010222120212), we get a palindrome (32212344321223).

The spelling of 21202122201011 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-two million, two hundred one thousand, eleven".

Divisors: 1 17 1247183658883 21202122201011