321512122412 has 24 divisors (see below), whose sum is σ = 606513363456. Its totient is φ = 148246535808.

The previous prime is 321512122409. The next prime is 321512122469. The reversal of 321512122412 is 214221215123.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2938988 + ... + 3046419.

It is an arithmetic number, because the mean of its divisors is an integer number (25271390144).

Almost surely, 2^321512122412 is an apocalyptic number.

It is an amenable number.

321512122412 is a deficient number, since it is larger than the sum of its proper divisors (285001241044).

321512122412 is a wasteful number, since it uses less digits than its factorization.

321512122412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5986457 (or 5986455 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

Adding to 321512122412 its reverse (214221215123), we get a palindrome (535733337535).

The spelling of 321512122412 in words is "three hundred twenty-one billion, five hundred twelve million, one hundred twenty-two thousand, four hundred twelve".