21023230112 has 24 divisors (see below), whose sum is σ = 41425454196. Its totient is φ = 10502479872.

The previous prime is 21023230087. The next prime is 21023230171. The reversal of 21023230112 is 21103232012.

It can be written as a sum of positive squares in 2 ways, for example, as 20873314576 + 149915536 = 144476^2 + 12244^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248003 + ... + 321794.

Almost surely, 2^21023230112 is an apocalyptic number.

It is an amenable number.

21023230112 is a deficient number, since it is larger than the sum of its proper divisors (20402224084).

21023230112 is a wasteful number, since it uses less digits than its factorization.

21023230112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570960 (or 570952 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21023230112 its reverse (21103232012), we get a palindrome (42126462124).

The spelling of 21023230112 in words is "twenty-one billion, twenty-three million, two hundred thirty thousand, one hundred twelve".