21002231010 has 32 divisors (see below), whose sum is σ = 50411185920. Its totient is φ = 5599947008.

The previous prime is 21002230943. The next prime is 21002231023. The reversal of 21002231010 is 1013220012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259594 + ... + 330746.

It is an arithmetic number, because the mean of its divisors is an integer number (1575349560).

Almost surely, 2^21002231010 is an apocalyptic number.

21002231010 is an abundant number, since it is smaller than the sum of its proper divisors (29408954910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002231010 is a wasteful number, since it uses less digits than its factorization.

21002231010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81002.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21002231010 its reverse (1013220012), we get a palindrome (22015451022).

The spelling of 21002231010 in words is "twenty-one billion, two million, two hundred thirty-one thousand, ten".