321112512 has 140 divisors (see below), whose sum is σ = 1087983600. Its totient is φ = 91736064.

The previous prime is 321112511. The next prime is 321112553. The reversal of 321112512 is 215211123.

It is a super-2 number, since 2×321112512² = 206226490725900288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321112511) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31864 + ... + 40712.

Almost surely, 2^321112512 is an apocalyptic number.

321112512 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 321112512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (543991800).

321112512 is an abundant number, since it is smaller than the sum of its proper divisors (766871088).

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

321112512 is an equidigital number, since it uses as much as digits as its factorization.

321112512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8880 (or 8861 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 321112512 is about 17919.6124958103. The cubic root of 321112512 is about 684.7821155110.

Adding to 321112512 its reverse (215211123), we get a palindrome (536323635).

The spelling of 321112512 in words is "three hundred twenty-one million, one hundred twelve thousand, five hundred twelve".