31223003211312 has 80 divisors (see below), whose sum is σ = 87993581800320. Its totient is φ = 9461356787200.

The previous prime is 31223003211271. The next prime is 31223003211317. The reversal of 31223003211312 is 21311230032213.

It is a super-2 number, since 2×31223003211312² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (31223003211317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33019012 + ... + 33951452.

It is an arithmetic number, because the mean of its divisors is an integer number (1099919772504).

Almost surely, 2^{31223003211312} is an apocalyptic number.

It is an amenable number.

31223003211312 is an abundant number, since it is smaller than the sum of its proper divisors (56770578589008).

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

31223003211312 is a wasteful number, since it uses less digits than its factorization.

31223003211312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995882 (or 995876 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31223003211312 its reverse (21311230032213), we get a palindrome (52534233243525).

The spelling of 31223003211312 in words is "thirty-one trillion, two hundred twenty-three billion, three million, two hundred eleven thousand, three hundred twelve".