31020012300 has 72 divisors (see below), whose sum is σ = 90136637136. Its totient is φ = 8236482560.

The previous prime is 31020012281. The next prime is 31020012311. The reversal of 31020012300 is 321002013.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151989 + ... + 291788.

It is an arithmetic number, because the mean of its divisors is an integer number (1251897738).

Almost surely, 2^31020012300 is an apocalyptic number.

31020012300 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31020012300 is an abundant number, since it is smaller than the sum of its proper divisors (59116624836).

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

31020012300 is a wasteful number, since it uses less digits than its factorization.

31020012300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444027 (or 444020 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 31020012300 its reverse (321002013), we get a palindrome (31341014313).

The spelling of 31020012300 in words is "thirty-one billion, twenty million, twelve thousand, three hundred".