31111131112 has 16 divisors (see below), whose sum is σ = 61764745860. Its totient is φ = 14640532224.

The previous prime is 31111131091. The next prime is 31111131127. The reversal of 31111131112 is 21113111113.

It can be written as a sum of positive squares in 2 ways, for example, as 30587911236 + 523219876 = 174894^2 + 22874^2 .

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, 114379023 + ... + 114379294.

Almost surely, 2^31111131112 is an apocalyptic number.

It is an amenable number.

31111131112 is a deficient number, since it is larger than the sum of its proper divisors (30653614748).

31111131112 is a wasteful number, since it uses less digits than its factorization.

31111131112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228758340 (or 228758336 counting only the distinct ones).

The product of its digits is 18, while the sum is 16.

Adding to 31111131112 its reverse (21113111113), we get a palindrome (52224242225).

The spelling of 31111131112 in words is "thirty-one billion, one hundred eleven million, one hundred thirty-one thousand, one hundred twelve".