12561224147 has 2 divisors, whose sum is σ = 12561224148. Its totient is φ = 12561224146.

The previous prime is 12561224107. The next prime is 12561224167. The reversal of 12561224147 is 74142216521.

It is a strong prime.

It is an emirp because it is prime and its reverse (74142216521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12561224147 - 2¹⁸ = 12560962003 is a prime.

It is not a weakly prime, because it can be changed into another prime (12561224107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6280612073 + 6280612074.

It is an arithmetic number, because the mean of its divisors is an integer number (6280612074).

Almost surely, 2^12561224147 is an apocalyptic number.

12561224147 is a deficient number, since it is larger than the sum of its proper divisors (1).

12561224147 is an equidigital number, since it uses as much as digits as its factorization.

12561224147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 35.

The spelling of 12561224147 in words is "twelve billion, five hundred sixty-one million, two hundred twenty-four thousand, one hundred forty-seven".