31211031112 has 32 divisors (see below), whose sum is σ = 61624785600. Its totient is φ = 14778396864.

The previous prime is 31211031041. The next prime is 31211031113. The reversal of 31211031112 is 21113011213.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31211031113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363558 + ... + 441130.

It is an arithmetic number, because the mean of its divisors is an integer number (1925774550).

Almost surely, 2^31211031112 is an apocalyptic number.

It is an amenable number.

31211031112 is a deficient number, since it is larger than the sum of its proper divisors (30413754488).

31211031112 is a wasteful number, since it uses less digits than its factorization.

31211031112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80245 (or 80241 counting only the distinct ones).

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

Adding to 31211031112 its reverse (21113011213), we get a palindrome (52324042325).

The spelling of 31211031112 in words is "thirty-one billion, two hundred eleven million, thirty-one thousand, one hundred twelve".