21102023312 has 20 divisors (see below), whose sum is σ = 40889623596. Its totient is φ = 10549862400.

The previous prime is 21102023311. The next prime is 21102023321. The reversal of 21102023312 is 21332020112.

It can be written as a sum of positive squares in 2 ways, for example, as 15804512656 + 5297510656 = 125716^2 + 72784^2 .

It is not an unprimeable number, because it can be changed into a prime (21102023311) 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, 90812 + ... + 224612.

Almost surely, 2^21102023312 is an apocalyptic number.

It is an amenable number.

21102023312 is a deficient number, since it is larger than the sum of its proper divisors (19787600284).

21102023312 is a wasteful number, since it uses less digits than its factorization.

21102023312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143666 (or 143660 counting only the distinct ones).

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

Adding to 21102023312 its reverse (21332020112), we get a palindrome (42434043424).

The spelling of 21102023312 in words is "twenty-one billion, one hundred two million, twenty-three thousand, three hundred twelve".