12312221022012 has 24 divisors (see below), whose sum is σ = 28728630515200. Its totient is φ = 4104057274416.

The previous prime is 12312221021999. The next prime is 12312221022029. The reversal of 12312221022012 is 21022012221321.

It is a self number, because there is not a number n which added to its sum of digits gives 12312221022012.

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, 1296789 + ... + 5128947.

Almost surely, 2^{12312221022012} is an apocalyptic number.

12312221022012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12312221022012 is an abundant number, since it is smaller than the sum of its proper divisors (16416409493188).

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

12312221022012 is a wasteful number, since it uses less digits than its factorization.

12312221022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4099905 (or 4099903 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 12312221022012 its reverse (21022012221321), we get a palindrome (33334233243333).

The spelling of 12312221022012 in words is "twelve trillion, three hundred twelve billion, two hundred twenty-one million, twenty-two thousand, twelve".