31200012111 has 16 divisors (see below), whose sum is σ = 42988936320. Its totient is φ = 20115127200.

The previous prime is 31200012089. The next prime is 31200012113. The reversal of 31200012111 is 11121000213.

It is not a de Polignac number, because 31200012111 - 2⁵ = 31200012079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200012113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1184301 + ... + 1210358.

It is an arithmetic number, because the mean of its divisors is an integer number (2686808520).

Almost surely, 2^31200012111 is an apocalyptic number.

31200012111 is a deficient number, since it is larger than the sum of its proper divisors (11788924209).

31200012111 is a wasteful number, since it uses less digits than its factorization.

31200012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394806.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 31200012111 its reverse (11121000213), we get a palindrome (42321012324).

The spelling of 31200012111 in words is "thirty-one billion, two hundred million, twelve thousand, one hundred eleven".