31140131112 has 96 divisors (see below), whose sum is σ = 88048658880. Its totient is φ = 9923781120.

The previous prime is 31140131083. The next prime is 31140131119. The reversal of 31140131112 is 21113104113.

It is a happy number.

31140131112 is a `hidden beast` number, since 311 + 40 + 1 + 311 + 1 + 2 = 666.

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 (31140131119) 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, 4794187 + ... + 4800677.

It is an arithmetic number, because the mean of its divisors is an integer number (917173530).

Almost surely, 2^31140131112 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 31140131112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44024329440).

31140131112 is an abundant number, since it is smaller than the sum of its proper divisors (56908527768).

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

31140131112 is a wasteful number, since it uses less digits than its factorization.

31140131112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9423 (or 9416 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 31140131112 its reverse (21113104113), we get a palindrome (52253235225).

The spelling of 31140131112 in words is "thirty-one billion, one hundred forty million, one hundred thirty-one thousand, one hundred twelve".