31240112000 has 128 divisors (see below), whose sum is σ = 77795359200. Its totient is φ = 12476006400.

The previous prime is 31240111949. The next prime is 31240112003. The reversal of 31240112000 is 21104213.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31240112003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13742864 + ... + 13745136.

Almost surely, 2^31240112000 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 31240112000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38897679600).

31240112000 is an abundant number, since it is smaller than the sum of its proper divisors (46555247200).

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

31240112000 is an equidigital number, since it uses as much as digits as its factorization.

31240112000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3161 (or 3139 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 31240112000 its reverse (21104213), we get a palindrome (31261216213).

The spelling of 31240112000 in words is "thirty-one billion, two hundred forty million, one hundred twelve thousand".