12562226521 has 4 divisors (see below), whose sum is σ = 13528551652. Its totient is φ = 11595901392.

The previous prime is 12562226491. The next prime is 12562226531.

12562226521 is nontrivially palindromic in base 10.

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 1541426121 + 11020800400 = 39261^2 + 104980^2 .

It is a cyclic number.

It is not a de Polignac number, because 12562226521 - 2⁷ = 12562226393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12562226531) 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, 483162546 + ... + 483162571.

It is an arithmetic number, because the mean of its divisors is an integer number (3382137913).

Almost surely, 2^12562226521 is an apocalyptic number.

It is an amenable number.

12562226521 is a deficient number, since it is larger than the sum of its proper divisors (966325131).

12562226521 is an equidigital number, since it uses as much as digits as its factorization.

12562226521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966325130.

The product of its digits is 28800, while the sum is 34.

The spelling of 12562226521 in words is "twelve billion, five hundred sixty-two million, two hundred twenty-six thousand, five hundred twenty-one".