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212110100102221 = 4214481112435721
BaseRepresentation
bin110000001110100110111011…
…001010110111110001001101
31000211000112020120110212011121
4300032212323022313301031
5210300202441111232341
62031042011302520541
762451310004626636
oct6016467312676115
91024015216425147
10212110100102221
116164842a899572
121b958437436151
139147b86b26839
143a5427dc0288d
15197c70cc7c4d1
hexc0e9bb2b7c4d

212110100102221 has 8 divisors (see below), whose sum is σ = 212661374333688. Its totient is φ = 211559050752000.

The previous prime is 212110100102213. The next prime is 212110100102287. The reversal of 212110100102221 is 122201001011212.

It can be written as a sum of positive squares in 4 ways, for example, as 34288168472100 + 177821931630121 = 5855610^2 + 13334989^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212110100102221 - 23 = 212110100102213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212110100102195 and 212110100102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212110100105221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54331360 + ... + 58104361.

It is an arithmetic number, because the mean of its divisors is an integer number (26582671791711).

Almost surely, 2212110100102221 is an apocalyptic number.

It is an amenable number.

212110100102221 is a deficient number, since it is larger than the sum of its proper divisors (551274231467).

212110100102221 is a wasteful number, since it uses less digits than its factorization.

212110100102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112440623.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212110100102221 its reverse (122201001011212), we get a palindrome (334311101113433).

The spelling of 212110100102221 in words is "two hundred twelve trillion, one hundred ten billion, one hundred million, one hundred two thousand, two hundred twenty-one".

Divisors: 1 421 4481 1886501 112435721 47335438541 503824465801 212110100102221