31023321213312 has 192 divisors, whose sum is σ = 94320762822000. Its totient is φ = 9760416952320.

The previous prime is 31023321213277. The next prime is 31023321213329. The reversal of 31023321213312 is 21331212332013.

31023321213312 is a `hidden beast` number, since 3 + 1 + 0 + 2 + 3 + 321 + 2 + 1 + 331 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3253362 + ... + 8522382.

Almost surely, 2^{31023321213312} is an apocalyptic number.

31023321213312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31023321213312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47160381411000).

31023321213312 is an abundant number, since it is smaller than the sum of its proper divisors (63297441608688).

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

31023321213312 is a wasteful number, since it uses less digits than its factorization.

31023321213312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269329 (or 5269314 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 31023321213312 its reverse (21331212332013), we get a palindrome (52354533545325).

The spelling of 31023321213312 in words is "thirty-one trillion, twenty-three billion, three hundred twenty-one million, two hundred thirteen thousand, three hundred twelve".