21120500522 has 16 divisors (see below), whose sum is σ = 34611445152. Its totient is φ = 9586164720.

The previous prime is 21120500503. The next prime is 21120500573. The reversal of 21120500522 is 22500502112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21120500494 and 21120500503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687773 + ... + 717824.

It is an arithmetic number, because the mean of its divisors is an integer number (2163215322).

Almost surely, 2^21120500522 is an apocalyptic number.

21120500522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21120500522 is a deficient number, since it is larger than the sum of its proper divisors (13490944630).

21120500522 is a wasteful number, since it uses less digits than its factorization.

21120500522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406293.

The product of its (nonzero) digits is 400, while the sum is 20.

The spelling of 21120500522 in words is "twenty-one billion, one hundred twenty million, five hundred thousand, five hundred twenty-two".