31311310131112 has 64 divisors (see below), whose sum is σ = 65490614864640. Its totient is φ = 13912117382400.

The previous prime is 31311310131103. The next prime is 31311310131119. The reversal of 31311310131112 is 21113101311313.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (31311310131119) 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 15 ways as a sum of consecutive naturals, for example, 1452939 + ... + 8045722.

It is an arithmetic number, because the mean of its divisors is an integer number (1023290857260).

Almost surely, 2^{31311310131112} is an apocalyptic number.

It is an amenable number.

31311310131112 is an abundant number, since it is smaller than the sum of its proper divisors (34179304733528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31311310131112 is a wasteful number, since it uses less digits than its factorization.

31311310131112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9499522 (or 9499518 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 22.

Adding to 31311310131112 its reverse (21113101311313), we get a palindrome (52424411442425).

The spelling of 31311310131112 in words is "thirty-one trillion, three hundred eleven billion, three hundred ten million, one hundred thirty-one thousand, one hundred twelve".