31012120036 has 24 divisors (see below), whose sum is σ = 57364667360. Its totient is φ = 14628988800.

The previous prime is 31012120031. The next prime is 31012120037. The reversal of 31012120036 is 63002121013.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 31012119995 and 31012120022.

It is not an unprimeable number, because it can be changed into a prime (31012120031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 828270 + ... + 864901.

Almost surely, 2^31012120036 is an apocalyptic number.

It is an amenable number.

31012120036 is a deficient number, since it is larger than the sum of its proper divisors (26352547324).

31012120036 is a wasteful number, since it uses less digits than its factorization.

31012120036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693435 (or 1693433 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31012120036 its reverse (63002121013), we get a palindrome (94014241049).

The spelling of 31012120036 in words is "thirty-one billion, twelve million, one hundred twenty thousand, thirty-six".