31303131112 has 32 divisors (see below), whose sum is σ = 64311239520. Its totient is φ = 14166005440.

The previous prime is 31303131109. The next prime is 31303131131. The reversal of 31303131112 is 21113130313.

It is a self number, because there is not a number n which added to its sum of digits gives 31303131112.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 763543 + ... + 803494.

It is an arithmetic number, because the mean of its divisors is an integer number (2009726235).

Almost surely, 2^31303131112 is an apocalyptic number.

It is an amenable number.

31303131112 is an abundant number, since it is smaller than the sum of its proper divisors (33008108408).

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

31303131112 is a wasteful number, since it uses less digits than its factorization.

31303131112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567281 (or 1567277 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31303131112 its reverse (21113130313), we get a palindrome (52416261425).

The spelling of 31303131112 in words is "thirty-one billion, three hundred three million, one hundred thirty-one thousand, one hundred twelve".