31111213123012 has 48 divisors (see below), whose sum is σ = 59677685222400. Its totient is φ = 14073952989600.

The previous prime is 31111213122973. The next prime is 31111213123021. The reversal of 31111213123012 is 21032131211113.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525435513 + ... + 525494719.

It is an arithmetic number, because the mean of its divisors is an integer number (1243285108800).

Almost surely, 2^{31111213123012} is an apocalyptic number.

It is an amenable number.

31111213123012 is a deficient number, since it is larger than the sum of its proper divisors (28566472099388).

31111213123012 is a wasteful number, since it uses less digits than its factorization.

31111213123012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116032 (or 116030 counting only the distinct ones).

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

Adding to 31111213123012 its reverse (21032131211113), we get a palindrome (52143344334125).

The spelling of 31111213123012 in words is "thirty-one trillion, one hundred eleven billion, two hundred thirteen million, one hundred twenty-three thousand, twelve".