1213231755024 has 135 divisors (see below), whose sum is σ = 3584214591399. Its totient is φ = 383046511680.

The previous prime is 1213231754983. The next prime is 1213231755049. The reversal of 1213231755024 is 4205571323121.

The square root of 1213231755024 is 1101468.

It is a perfect power (a square), and thus also a powerful number.

1213231755024 is a `hidden beast` number, since 1 + 2 + 132 + 3 + 17 + 5 + 502 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1213231755024.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 251132289 + ... + 251137119.

Almost surely, 2^{1213231755024} is an apocalyptic number.

1213231755024 is the 1101468-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213231755024

1213231755024 is an abundant number, since it is smaller than the sum of its proper divisors (2370982836375).

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

1213231755024 is an frugal number, since it uses more digits than its factorization.

1213231755024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9714 (or 4855 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

Multiplying 1213231755024 by its sum of digits (36), we get a square (43676343180864 = 6608808²).

1213231755024 divided by its sum of digits (36) gives a square (33700882084 = 183578²).

The spelling of 1213231755024 in words is "one trillion, two hundred thirteen billion, two hundred thirty-one million, seven hundred fifty-five thousand, twenty-four".