12521366383 has 4 divisors (see below), whose sum is σ = 12697723728. Its totient is φ = 12345009040.

The previous prime is 12521366369. The next prime is 12521366399. The reversal of 12521366383 is 38366312521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12521366383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521366323) 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, 88178566 + ... + 88178707.

It is an arithmetic number, because the mean of its divisors is an integer number (3174430932).

Almost surely, 2^12521366383 is an apocalyptic number.

12521366383 is a deficient number, since it is larger than the sum of its proper divisors (176357345).

12521366383 is an equidigital number, since it uses as much as digits as its factorization.

12521366383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176357344.

The product of its digits is 155520, while the sum is 40.

The spelling of 12521366383 in words is "twelve billion, five hundred twenty-one million, three hundred sixty-six thousand, three hundred eighty-three".