21256201616104 has 32 divisors (see below), whose sum is σ = 49052772961920. Its totient is φ = 8409046792896.

The previous prime is 21256201616093. The next prime is 21256201616107. The reversal of 21256201616104 is 40161610265212.

It is a super-2 number, since 2×21256201616104² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21256201616107) 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, 14599038844 + ... + 14599040299.

It is an arithmetic number, because the mean of its divisors is an integer number (1532899155060).

Almost surely, 2^{21256201616104} is an apocalyptic number.

It is an amenable number.

21256201616104 is an abundant number, since it is smaller than the sum of its proper divisors (27796571345816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21256201616104 is a wasteful number, since it uses less digits than its factorization.

21256201616104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29198079169 (or 29198079165 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 21256201616104 in words is "twenty-one trillion, two hundred fifty-six billion, two hundred one million, six hundred sixteen thousand, one hundred four".