12052626521 has 4 divisors (see below), whose sum is σ = 12979751652. Its totient is φ = 11125501392.

The previous prime is 12052626503. The next prime is 12052626571. The reversal of 12052626521 is 12562625021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1860714496 + 10191912025 = 43136^2 + 100955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12052626521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12052626571) 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, 463562546 + ... + 463562571.

It is an arithmetic number, because the mean of its divisors is an integer number (3244937913).

Almost surely, 2^12052626521 is an apocalyptic number.

It is an amenable number.

12052626521 is a deficient number, since it is larger than the sum of its proper divisors (927125131).

12052626521 is an equidigital number, since it uses as much as digits as its factorization.

12052626521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927125130.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 12052626521 in words is "twelve billion, fifty-two million, six hundred twenty-six thousand, five hundred twenty-one".