31303111300000 has 72 divisors (see below), whose sum is σ = 77030070470892. Its totient is φ = 12521244480000.

The previous prime is 31303111299989. The next prime is 31303111300051. The reversal of 31303111300000 is 311130313.

It can be written as a sum of positive squares in 6 ways, for example, as 5301800974096 + 26001310325904 = 2302564^2 + 5099148^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156415557 + ... + 156615556.

Almost surely, 2^{31303111300000} is an apocalyptic number.

It is an amenable number.

31303111300000 is an abundant number, since it is smaller than the sum of its proper divisors (45726959170892).

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

31303111300000 is an frugal number, since it uses more digits than its factorization.

31303111300000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313031148 (or 313031120 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 16.

Adding to 31303111300000 its reverse (311130313), we get a palindrome (31303422430313).

The spelling of 31303111300000 in words is "thirty-one trillion, three hundred three billion, one hundred eleven million, three hundred thousand".