21013233112 has 16 divisors (see below), whose sum is σ = 41717448360. Its totient is φ = 9888580224.

The previous prime is 21013233107. The next prime is 21013233119. The reversal of 21013233112 is 21133231012.

It is a self number, because there is not a number n which added to its sum of digits gives 21013233112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013233119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77254398 + ... + 77254669.

Almost surely, 2^21013233112 is an apocalyptic number.

It is an amenable number.

21013233112 is a deficient number, since it is larger than the sum of its proper divisors (20704215248).

21013233112 is a wasteful number, since it uses less digits than its factorization.

21013233112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154509090 (or 154509086 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21013233112 its reverse (21133231012), we get a palindrome (42146464124).

The spelling of 21013233112 in words is "twenty-one billion, thirteen million, two hundred thirty-three thousand, one hundred twelve".