31112012140 has 48 divisors (see below), whose sum is σ = 74373707520. Its totient is φ = 10821567680.

The previous prime is 31112012119. The next prime is 31112012147. The reversal of 31112012140 is 4121021113.

It is not an unprimeable number, because it can be changed into a prime (31112012147) 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, 3069250 + ... + 3079369.

It is an arithmetic number, because the mean of its divisors is an integer number (1549452240).

Almost surely, 2^31112012140 is an apocalyptic number.

It is an amenable number.

31112012140 is an abundant number, since it is smaller than the sum of its proper divisors (43261695380).

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

31112012140 is a wasteful number, since it uses less digits than its factorization.

31112012140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6148662 (or 6148660 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31112012140 its reverse (4121021113), we get a palindrome (35233033253).

The spelling of 31112012140 in words is "thirty-one billion, one hundred twelve million, twelve thousand, one hundred forty".