21031021330 has 16 divisors (see below), whose sum is σ = 41297278464. Its totient is φ = 7647644080.

The previous prime is 21031021303. The next prime is 21031021391. The reversal of 21031021330 is 3312013012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95595442 + ... + 95595661.

It is an arithmetic number, because the mean of its divisors is an integer number (2581079904).

Almost surely, 2^21031021330 is an apocalyptic number.

21031021330 is a deficient number, since it is larger than the sum of its proper divisors (20266257134).

21031021330 is a wasteful number, since it uses less digits than its factorization.

21031021330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191191121.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21031021330 its reverse (3312013012), we get a palindrome (24343034342).

The spelling of 21031021330 in words is "twenty-one billion, thirty-one million, twenty-one thousand, three hundred thirty".