12231437137920 has 5184 divisors, whose sum is σ = 61411105566720. Its totient is φ = 2222102937600.

The previous prime is 12231437137891. The next prime is 12231437137979. The reversal of 12231437137920 is 2973173413221.

12231437137920 is a `hidden beast` number, since 1 + 2 + 231 + 43 + 7 + 1 + 379 + 2 + 0 = 666.

12231437137920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12231437137920² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 260243343337 + ... + 260243343383.

It is an arithmetic number, because the mean of its divisors is an integer number (11846278080).

Almost surely, 2^{12231437137920} is an apocalyptic number.

12231437137920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12231437137920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30705552783360).

12231437137920 is an abundant number, since it is smaller than the sum of its proper divisors (49179668428800).

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

12231437137920 is a wasteful number, since it uses less digits than its factorization.

12231437137920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The spelling of 12231437137920 in words is "twelve trillion, two hundred thirty-one billion, four hundred thirty-seven million, one hundred thirty-seven thousand, nine hundred twenty".