31200021120091 has 8 divisors (see below), whose sum is σ = 31424984849664. Its totient is φ = 30975511405800.

The previous prime is 31200021120089. The next prime is 31200021120113. The reversal of 31200021120091 is 19002112000213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31200021120091 - 2¹ = 31200021120089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31200021120001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113365885 + ... + 113640766.

It is an arithmetic number, because the mean of its divisors is an integer number (3928123106208).

Almost surely, 2^{31200021120091} is an apocalyptic number.

31200021120091 is a deficient number, since it is larger than the sum of its proper divisors (224963729573).

31200021120091 is a wasteful number, since it uses less digits than its factorization.

31200021120091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227007641.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 31200021120091 in words is "thirty-one trillion, two hundred billion, twenty-one million, one hundred twenty thousand, ninety-one".