21311321223300 has 36 divisors (see below), whose sum is σ = 61660756073616. Its totient is φ = 5683018992800.

The previous prime is 21311321223263. The next prime is 21311321223319. The reversal of 21311321223300 is 332212311312.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35518868406 + ... + 35518869005.

Almost surely, 2^{21311321223300} is an apocalyptic number.

21311321223300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21311321223300 is an abundant number, since it is smaller than the sum of its proper divisors (40349434850316).

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

21311321223300 is a wasteful number, since it uses less digits than its factorization.

21311321223300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71037737428 (or 71037737421 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21311321223300 its reverse (332212311312), we get a palindrome (21643533534612).

The spelling of 21311321223300 in words is "twenty-one trillion, three hundred eleven billion, three hundred twenty-one million, two hundred twenty-three thousand, three hundred".