321031320000000 has 320 divisors, whose sum is σ = 1069057038988224. Its totient is φ = 85608320000000.

The previous prime is 321031319999969. The next prime is 321031320000073. The reversal of 321031320000000 is 23130123.

It is a tau number, because it is divible by the number of its divisors (320).

It is a super-2 number, since 2×321031320000000² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118662370 + ... + 121337630.

Almost surely, 2^{321031320000000} is an apocalyptic number.

321031320000000 is a gapful number since it is divisible by the number (30) 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 321031320000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534528519494112).

321031320000000 is an abundant number, since it is smaller than the sum of its proper divisors (748025718988224).

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

321031320000000 is an frugal number, since it uses more digits than its factorization.

321031320000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675317 (or 2675271 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 321031320000000 its reverse (23130123), we get a palindrome (321031343130123).

The spelling of 321031320000000 in words is "three hundred twenty-one trillion, thirty-one billion, three hundred twenty million", and thus it is an aban number.