31231311112 has 16 divisors (see below), whose sum is σ = 59216672700. Its totient is φ = 15440198400.

The previous prime is 31231311103. The next prime is 31231311121. The reversal of 31231311112 is 21111313213.

It is an interprime number because it is at equal distance from previous prime (31231311103) and next prime (31231311121).

It can be written as a sum of positive squares in 2 ways, for example, as 30999236356 + 232074756 = 176066^2 + 15234^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31231311112.

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, 21931389 + ... + 21932812.

Almost surely, 2^31231311112 is an apocalyptic number.

It is an amenable number.

31231311112 is a deficient number, since it is larger than the sum of its proper divisors (27985361588).

31231311112 is a wasteful number, since it uses less digits than its factorization.

31231311112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43864296 (or 43864292 counting only the distinct ones).

The product of its digits is 108, while the sum is 19.

Adding to 31231311112 its reverse (21111313213), we get a palindrome (52342624325).

The spelling of 31231311112 in words is "thirty-one billion, two hundred thirty-one million, three hundred eleven thousand, one hundred twelve".