31311201231320 has 32 divisors (see below), whose sum is σ = 70450422552720. Its totient is φ = 12524441420160.

The previous prime is 31311201231293. The next prime is 31311201231437. The reversal of 31311201231320 is 2313210211313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14149994 + ... + 16212486.

Almost surely, 2^{31311201231320} is an apocalyptic number.

It is an amenable number.

31311201231320 is an abundant number, since it is smaller than the sum of its proper divisors (39139221321400).

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

31311201231320 is a wasteful number, since it uses less digits than its factorization.

31311201231320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442035 (or 2442031 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31311201231320 its reverse (2313210211313), we get a palindrome (33624411442633).

The spelling of 31311201231320 in words is "thirty-one trillion, three hundred eleven billion, two hundred one million, two hundred thirty-one thousand, three hundred twenty".