31203140112 has 120 divisors (see below), whose sum is σ = 91161179200. Its totient is φ = 10331971200.

The previous prime is 31203140053. The next prime is 31203140113. The reversal of 31203140112 is 21104130213.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31203140113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 560514 + ... + 613662.

Almost surely, 2^31203140112 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 31203140112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45580589600).

31203140112 is an abundant number, since it is smaller than the sum of its proper divisors (59958039088).

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

31203140112 is a wasteful number, since it uses less digits than its factorization.

31203140112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53323 (or 53305 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31203140112 its reverse (21104130213), we get a palindrome (52307270325).

The spelling of 31203140112 in words is "thirty-one billion, two hundred three million, one hundred forty thousand, one hundred twelve".