21023200012 has 6 divisors (see below), whose sum is σ = 36790600028. Its totient is φ = 10511600004.

The previous prime is 21023199973. The next prime is 21023200021. The reversal of 21023200012 is 21000232012.

It is a junction number, because it is equal to n+sod(n) for n = 21023199965 and 21023200001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2627899998 + ... + 2627900005.

Almost surely, 2^21023200012 is an apocalyptic number.

It is an amenable number.

21023200012 is a deficient number, since it is larger than the sum of its proper divisors (15767400016).

21023200012 is a wasteful number, since it uses less digits than its factorization.

21023200012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5255800007 (or 5255800005 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21023200012 its reverse (21000232012), we get a palindrome (42023432024).

It can be divided in two parts, 210232000 and 12, that added together give a palindrome (210232012).

The spelling of 21023200012 in words is "twenty-one billion, twenty-three million, two hundred thousand, twelve".