31920232201 has 32 divisors (see below), whose sum is σ = 38035565568. Its totient is φ = 26406527040.

The previous prime is 31920232181. The next prime is 31920232261. The reversal of 31920232201 is 10223202913.

It is a cyclic number.

It is not a de Polignac number, because 31920232201 - 2²⁵ = 31886677769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31920232261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3338710 + ... + 3348256.

It is an arithmetic number, because the mean of its divisors is an integer number (1188611424).

Almost surely, 2^31920232201 is an apocalyptic number.

It is an amenable number.

31920232201 is a deficient number, since it is larger than the sum of its proper divisors (6115333367).

31920232201 is a wasteful number, since it uses less digits than its factorization.

31920232201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9901.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 31920232201 in words is "thirty-one billion, nine hundred twenty million, two hundred thirty-two thousand, two hundred one".