12312212320 has 48 divisors (see below), whose sum is σ = 29104433568. Its totient is φ = 4922035200.

The previous prime is 12312212267. The next prime is 12312212351. The reversal of 12312212320 is 2321221321.

It is a congruent number.

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, 266797 + ... + 309523.

It is an arithmetic number, because the mean of its divisors is an integer number (606342366).

Almost surely, 2^12312212320 is an apocalyptic number.

12312212320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12312212320 is an abundant number, since it is smaller than the sum of its proper divisors (16792221248).

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

12312212320 is a wasteful number, since it uses less digits than its factorization.

12312212320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44543 (or 44535 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12312212320 its reverse (2321221321), we get a palindrome (14633433641).

Subtracting from 12312212320 its reverse (2321221321), we obtain a palindrome (9990990999).

The spelling of 12312212320 in words is "twelve billion, three hundred twelve million, two hundred twelve thousand, three hundred twenty".