12331313121220 has 12 divisors (see below), whose sum is σ = 25895757554604. Its totient is φ = 4932525248480.

The previous prime is 12331313121163. The next prime is 12331313121263. The reversal of 12331313121220 is 2212131313321.

It can be written as a sum of positive squares in 2 ways, for example, as 1977758443584 + 10353554677636 = 1406328^2 + 3217694^2 .

It is a super-2 number, since 2×12331313121220² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308282828011 + ... + 308282828050.

It is an arithmetic number, because the mean of its divisors is an integer number (2157979796217).

Almost surely, 2^{12331313121220} is an apocalyptic number.

12331313121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12331313121220 is an abundant number, since it is smaller than the sum of its proper divisors (13564444433384).

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

12331313121220 is a wasteful number, since it uses less digits than its factorization.

12331313121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616565656070 (or 616565656068 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 12331313121220 its reverse (2212131313321), we get a palindrome (14543444434541).

The spelling of 12331313121220 in words is "twelve trillion, three hundred thirty-one billion, three hundred thirteen million, one hundred twenty-one thousand, two hundred twenty".