12522221461 has 4 divisors (see below), whose sum is σ = 12537364032. Its totient is φ = 12507078892.

The previous prime is 12522221441. The next prime is 12522221477. The reversal of 12522221461 is 16412222521.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16412222521 = 3371 ⋅4868651.

It is a cyclic number.

It is not a de Polignac number, because 12522221461 - 2¹³ = 12522213269 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 (12522221441) 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, 7570045 + ... + 7571698.

It is an arithmetic number, because the mean of its divisors is an integer number (3134341008).

Almost surely, 2^12522221461 is an apocalyptic number.

It is an amenable number.

12522221461 is a deficient number, since it is larger than the sum of its proper divisors (15142571).

12522221461 is an equidigital number, since it uses as much as digits as its factorization.

12522221461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15142570.

The product of its digits is 3840, while the sum is 28.

Adding to 12522221461 its reverse (16412222521), we get a palindrome (28934443982).

The spelling of 12522221461 in words is "twelve billion, five hundred twenty-two million, two hundred twenty-one thousand, four hundred sixty-one".