12312220201312 has 48 divisors (see below), whose sum is σ = 25666058153232. Its totient is φ = 5793870643200.

The previous prime is 12312220201283. The next prime is 12312220201313. The reversal of 12312220201312 is 21310202221321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312220201313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31138483 + ... + 31531405.

It is an arithmetic number, because the mean of its divisors is an integer number (534709544859).

Almost surely, 2^{12312220201312} is an apocalyptic number.

It is an amenable number.

12312220201312 is an abundant number, since it is smaller than the sum of its proper divisors (13353837951920).

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

12312220201312 is a wasteful number, since it uses less digits than its factorization.

12312220201312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450551 (or 450543 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 12312220201312 its reverse (21310202221321), we get a palindrome (33622422422633).

The spelling of 12312220201312 in words is "twelve trillion, three hundred twelve billion, two hundred twenty million, two hundred one thousand, three hundred twelve".