12452311565021 has 4 divisors (see below), whose sum is σ = 12741900206112. Its totient is φ = 12162722923932.

The previous prime is 12452311564981. The next prime is 12452311565033. The reversal of 12452311565021 is 12056511325421.

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 a de Polignac number, because none of the positive numbers 2^k-12452311565021 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 (12452311565051) 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, 144794320481 + ... + 144794320566.

It is an arithmetic number, because the mean of its divisors is an integer number (3185475051528).

Almost surely, 2^{12452311565021} is an apocalyptic number.

It is an amenable number.

12452311565021 is a deficient number, since it is larger than the sum of its proper divisors (289588641091).

12452311565021 is an equidigital number, since it uses as much as digits as its factorization.

12452311565021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289588641090.

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 12452311565021 in words is "twelve trillion, four hundred fifty-two billion, three hundred eleven million, five hundred sixty-five thousand, twenty-one".