31001440120 has 64 divisors (see below), whose sum is σ = 81872556480. Its totient is φ = 10341789696.

The previous prime is 31001440109. The next prime is 31001440219. The reversal of 31001440120 is 2104410013.

It is a super-2 number, since 2×31001440120² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31001440094 and 31001440103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1485849 + ... + 1506568.

It is an arithmetic number, because the mean of its divisors is an integer number (1279258695).

Almost surely, 2^31001440120 is an apocalyptic number.

It is an amenable number.

31001440120 is an abundant number, since it is smaller than the sum of its proper divisors (50871116360).

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

31001440120 is a wasteful number, since it uses less digits than its factorization.

31001440120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992472 (or 2992468 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31001440120 its reverse (2104410013), we get a palindrome (33105850133).

The spelling of 31001440120 in words is "thirty-one billion, one million, four hundred forty thousand, one hundred twenty".