21112133004 has 24 divisors (see below), whose sum is σ = 54735159920. Its totient is φ = 7037377632.

The previous prime is 21112132999. The next prime is 21112133027. The reversal of 21112133004 is 40033121112.

21112133004 is a `hidden beast` number, since 211 + 121 + 330 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 97741249 + ... + 97741464.

Almost surely, 2^21112133004 is an apocalyptic number.

It is an amenable number.

21112133004 is an abundant number, since it is smaller than the sum of its proper divisors (33623026916).

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

21112133004 is a wasteful number, since it uses less digits than its factorization.

21112133004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195482726 (or 195482718 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21112133004 its reverse (40033121112), we get a palindrome (61145254116).

The spelling of 21112133004 in words is "twenty-one billion, one hundred twelve million, one hundred thirty-three thousand, four".