31311201012111 has 48 divisors (see below), whose sum is σ = 47925124191360. Its totient is φ = 19674522915840.

The previous prime is 31311201012017. The next prime is 31311201012191. The reversal of 31311201012111 is 11121010211313.

31311201012111 is a `hidden beast` number, since 31 + 311 + 201 + 0 + 12 + 111 = 666.

It is not a de Polignac number, because 31311201012111 - 2¹³ = 31311201003919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311201012191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9834250 + ... + 12622791.

It is an arithmetic number, because the mean of its divisors is an integer number (998440087320).

Almost surely, 2^{31311201012111} is an apocalyptic number.

31311201012111 is a deficient number, since it is larger than the sum of its proper divisors (16613923179249).

31311201012111 is a wasteful number, since it uses less digits than its factorization.

31311201012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22457216 (or 22457213 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 31311201012111 its reverse (11121010211313), we get a palindrome (42432211223424).

The spelling of 31311201012111 in words is "thirty-one trillion, three hundred eleven billion, two hundred one million, twelve thousand, one hundred eleven".