21112031522 has 16 divisors (see below), whose sum is σ = 33050650752. Its totient is φ = 10095307200.

The previous prime is 21112031509. The next prime is 21112031533. The reversal of 21112031522 is 22513021112.

It is a junction number, because it is equal to n+sod(n) for n = 21112031494 and 21112031503.

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, 251147 + ... + 324497.

It is an arithmetic number, because the mean of its divisors is an integer number (2065665672).

Almost surely, 2^21112031522 is an apocalyptic number.

21112031522 is a deficient number, since it is larger than the sum of its proper divisors (11938619230).

21112031522 is a wasteful number, since it uses less digits than its factorization.

21112031522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79633.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 21112031522 its reverse (22513021112), we get a palindrome (43625052634).

The spelling of 21112031522 in words is "twenty-one billion, one hundred twelve million, thirty-one thousand, five hundred twenty-two".