12312212013 has 24 divisors (see below), whose sum is σ = 17929806336. Its totient is φ = 8141241600.

The previous prime is 12312211993. The next prime is 12312212023. The reversal of 12312212013 is 31021221321.

It is not a de Polignac number, because 12312212013 - 2¹³ = 12312203821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312212023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 586173 + ... + 606813.

It is an arithmetic number, because the mean of its divisors is an integer number (747075264).

Almost surely, 2^12312212013 is an apocalyptic number.

It is an amenable number.

12312212013 is a deficient number, since it is larger than the sum of its proper divisors (5617594323).

12312212013 is a wasteful number, since it uses less digits than its factorization.

12312212013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21185 (or 21182 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12312212013 its reverse (31021221321), we get a palindrome (43333433334).

The spelling of 12312212013 in words is "twelve billion, three hundred twelve million, two hundred twelve thousand, thirteen".