21975521000010 has 32 divisors (see below), whose sum is σ = 52800710723712. Its totient is φ = 5853532230720.

The previous prime is 21975520999979. The next prime is 21975521000023. The reversal of 21975521000010 is 1000012557912.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412891861 + ... + 412945080.

It is an arithmetic number, because the mean of its divisors is an integer number (1650022210116).

Almost surely, 2^{21975521000010} is an apocalyptic number.

21975521000010 is an abundant number, since it is smaller than the sum of its proper divisors (30825189723702).

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

21975521000010 is a wasteful number, since it uses less digits than its factorization.

21975521000010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825837838.

The product of its (nonzero) digits is 6300, while the sum is 33.

Adding to 21975521000010 its reverse (1000012557912), we get a palindrome (22975533557922).

The spelling of 21975521000010 in words is "twenty-one trillion, nine hundred seventy-five billion, five hundred twenty-one million, ten", and thus it is an aban number.