31131001120012 has 12 divisors (see below), whose sum is σ = 54755796387600. Its totient is φ = 15486487866416.

The previous prime is 31131001119991. The next prime is 31131001120057. The reversal of 31131001120012 is 21002110013113.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19753172512 + ... + 19753174087.

It is an arithmetic number, because the mean of its divisors is an integer number (4562983032300).

Almost surely, 2^{31131001120012} is an apocalyptic number.

It is an amenable number.

31131001120012 is a deficient number, since it is larger than the sum of its proper divisors (23624795267588).

31131001120012 is a wasteful number, since it uses less digits than its factorization.

31131001120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39506346800 (or 39506346798 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31131001120012 its reverse (21002110013113), we get a palindrome (52133111133125).

The spelling of 31131001120012 in words is "thirty-one trillion, one hundred thirty-one billion, one million, one hundred twenty thousand, twelve".