31200320012 has 48 divisors (see below), whose sum is σ = 57047464320. Its totient is φ = 14920215552.

The previous prime is 31200319981. The next prime is 31200320089. The reversal of 31200320012 is 21002300213.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1485488 + ... + 1506344.

It is an arithmetic number, because the mean of its divisors is an integer number (1188488840).

Almost surely, 2^31200320012 is an apocalyptic number.

It is an amenable number.

31200320012 is a deficient number, since it is larger than the sum of its proper divisors (25847144308).

31200320012 is a wasteful number, since it uses less digits than its factorization.

31200320012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21090 (or 21088 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31200320012 its reverse (21002300213), we get a palindrome (52202620225).

The spelling of 31200320012 in words is "thirty-one billion, two hundred million, three hundred twenty thousand, twelve".