21023231002 has 32 divisors (see below), whose sum is σ = 32918667264. Its totient is φ = 10058256000.

The previous prime is 21023230997. The next prime is 21023231003. The reversal of 21023231002 is 20013232012.

It is not an unprimeable number, because it can be changed into a prime (21023231003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5865703 + ... + 5869285.

It is an arithmetic number, because the mean of its divisors is an integer number (1028708352).

Almost surely, 2^21023231002 is an apocalyptic number.

21023231002 is a deficient number, since it is larger than the sum of its proper divisors (11895436262).

21023231002 is a wasteful number, since it uses less digits than its factorization.

21023231002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4654.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21023231002 its reverse (20013232012), we get a palindrome (41036463014).

The spelling of 21023231002 in words is "twenty-one billion, twenty-three million, two hundred thirty-one thousand, two".