31143112012 has 24 divisors (see below), whose sum is σ = 54760305600. Its totient is φ = 15497387136.

The previous prime is 31143112003. The next prime is 31143112043. The reversal of 31143112012 is 21021134113.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1820314 + ... + 1837342.

It is an arithmetic number, because the mean of its divisors is an integer number (2281679400).

Almost surely, 2^31143112012 is an apocalyptic number.

It is an amenable number.

31143112012 is a deficient number, since it is larger than the sum of its proper divisors (23617193588).

31143112012 is a wasteful number, since it uses less digits than its factorization.

31143112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19185 (or 19183 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31143112012 its reverse (21021134113), we get a palindrome (52164246125).

The spelling of 31143112012 in words is "thirty-one billion, one hundred forty-three million, one hundred twelve thousand, twelve".