12324457981 has 4 divisors (see below), whose sum is σ = 13444863264. Its totient is φ = 11204052700.

The previous prime is 12324457973. The next prime is 12324457993. The reversal of 12324457981 is 18975442321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12324457981 - 2³ = 12324457973 is a prime.

It is a super-2 number, since 2×12324457981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12324457081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560202625 + ... + 560202646.

It is an arithmetic number, because the mean of its divisors is an integer number (3361215816).

Almost surely, 2^12324457981 is an apocalyptic number.

12324457981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12324457981 is a deficient number, since it is larger than the sum of its proper divisors (1120405283).

12324457981 is a wasteful number, since it uses less digits than its factorization.

12324457981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120405282.

The product of its digits is 483840, while the sum is 46.

The spelling of 12324457981 in words is "twelve billion, three hundred twenty-four million, four hundred fifty-seven thousand, nine hundred eighty-one".