31300320012 has 24 divisors (see below), whose sum is σ = 78652086576. Its totient is φ = 9630867648.

The previous prime is 31300319977. The next prime is 31300320013. The reversal of 31300320012 is 21002300313.

It is a junction number, because it is equal to n+sod(n) for n = 31300319973 and 31300320000.

It is not an unprimeable number, because it can be changed into a prime (31300320013) 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, 100321383 + ... + 100321694.

It is an arithmetic number, because the mean of its divisors is an integer number (3277170274).

Almost surely, 2^31300320012 is an apocalyptic number.

It is an amenable number.

31300320012 is an abundant number, since it is smaller than the sum of its proper divisors (47351766564).

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

31300320012 is a wasteful number, since it uses less digits than its factorization.

31300320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200643097 (or 200643095 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31300320012 its reverse (21002300313), we get a palindrome (52302620325).

The spelling of 31300320012 in words is "thirty-one billion, three hundred million, three hundred twenty thousand, twelve".