12252127621 has 4 divisors (see below), whose sum is σ = 12550960044. Its totient is φ = 11953295200.

The previous prime is 12252127619. The next prime is 12252127627. The reversal of 12252127621 is 12672125221.

It is a happy number.

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 603242721 + 11648884900 = 24561^2 + 107930^2 .

It is a cyclic number.

It is not a de Polignac number, because 12252127621 - 2¹ = 12252127619 is a prime.

It is a super-2 number, since 2×12252127621² (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 (12252127627) 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, 149416150 + ... + 149416231.

It is an arithmetic number, because the mean of its divisors is an integer number (3137740011).

Almost surely, 2^12252127621 is an apocalyptic number.

It is an amenable number.

12252127621 is a deficient number, since it is larger than the sum of its proper divisors (298832423).

12252127621 is an equidigital number, since it uses as much as digits as its factorization.

12252127621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298832422.

The product of its digits is 6720, while the sum is 31.

The spelling of 12252127621 in words is "twelve billion, two hundred fifty-two million, one hundred twenty-seven thousand, six hundred twenty-one".