921200331311 has 24 divisors (see below), whose sum is σ = 1064083229664. Its totient is φ = 792548421120.

The previous prime is 921200331281. The next prime is 921200331313. The reversal of 921200331311 is 113133002129.

It is not a de Polignac number, because 921200331311 - 2²² = 921196137007 is a prime.

It is a super-2 number, since 2×921200331311² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921200331313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 803300 + ... + 1577241.

It is an arithmetic number, because the mean of its divisors is an integer number (44336801236).

Almost surely, 2^921200331311 is an apocalyptic number.

921200331311 is a deficient number, since it is larger than the sum of its proper divisors (142882898353).

921200331311 is a wasteful number, since it uses less digits than its factorization.

921200331311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380691 (or 2380674 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 921200331311 in words is "nine hundred twenty-one billion, two hundred million, three hundred thirty-one thousand, three hundred eleven".