31112320000 has 220 divisors, whose sum is σ = 78445355076. Its totient is φ = 12328960000.

The previous prime is 31112319991. The next prime is 31112320049. The reversal of 31112320000 is 2321113.

It can be written as a sum of positive squares in 10 ways, for example, as 14124847104 + 16987472896 = 118848^2 + 130336^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 110719860 + ... + 110720140.

Almost surely, 2^31112320000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31112320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39222677538).

31112320000 is an abundant number, since it is smaller than the sum of its proper divisors (47333035076).

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

31112320000 is an equidigital number, since it uses as much as digits as its factorization.

31112320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31112320000 its reverse (2321113), we get a palindrome (31114641113).

The spelling of 31112320000 in words is "thirty-one billion, one hundred twelve million, three hundred twenty thousand".