31200112000 has 256 divisors, whose sum is σ = 80339688000. Its totient is φ = 12042240000.

The previous prime is 31200111959. The next prime is 31200112001. The reversal of 31200112000 is 21100213.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200112001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69487776 + ... + 69488224.

Almost surely, 2^31200112000 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 31200112000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40169844000).

31200112000 is an abundant number, since it is smaller than the sum of its proper divisors (49139576000).

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

31200112000 is a wasteful number, since it uses less digits than its factorization.

31200112000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 31200112000 its reverse (21100213), we get a palindrome (31221212213).

The spelling of 31200112000 in words is "thirty-one billion, two hundred million, one hundred twelve thousand".