21112011204 has 24 divisors (see below), whose sum is σ = 52159087008. Its totient is φ = 6623376000.

The previous prime is 21112011191. The next prime is 21112011287. The reversal of 21112011204 is 40211021112.

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, 51744922 + ... + 51745329.

It is an arithmetic number, because the mean of its divisors is an integer number (2173295292).

Almost surely, 2^21112011204 is an apocalyptic number.

It is an amenable number.

21112011204 is an abundant number, since it is smaller than the sum of its proper divisors (31047075804).

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

21112011204 is a wasteful number, since it uses less digits than its factorization.

21112011204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103490275 (or 103490273 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21112011204 its reverse (40211021112), we get a palindrome (61323032316).

The spelling of 21112011204 in words is "twenty-one billion, one hundred twelve million, eleven thousand, two hundred four".