12312322212 has 12 divisors (see below), whose sum is σ = 28728751856. Its totient is φ = 4104107400.

The previous prime is 12312322207. The next prime is 12312322249. The reversal of 12312322212 is 21222321321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513013414 + ... + 513013437.

Almost surely, 2^12312322212 is an apocalyptic number.

12312322212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12312322212 is an abundant number, since it is smaller than the sum of its proper divisors (16416429644).

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

12312322212 is a wasteful number, since it uses less digits than its factorization.

12312322212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026026858 (or 1026026856 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

Adding to 12312322212 its reverse (21222321321), we get a palindrome (33534643533).

The spelling of 12312322212 in words is "twelve billion, three hundred twelve million, three hundred twenty-two thousand, two hundred twelve".