12261574109 has 2 divisors, whose sum is σ = 12261574110. Its totient is φ = 12261574108.

The previous prime is 12261574099. The next prime is 12261574151. The reversal of 12261574109 is 90147516221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11995068484 + 266505625 = 109522^2 + 16325^2 .

It is a cyclic number.

It is not a de Polignac number, because 12261574109 - 2²⁰ = 12260525533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12261570109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6130787054 + 6130787055.

It is an arithmetic number, because the mean of its divisors is an integer number (6130787055).

Almost surely, 2^12261574109 is an apocalyptic number.

It is an amenable number.

12261574109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12261574109 is an equidigital number, since it uses as much as digits as its factorization.

12261574109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 12261574109 in words is "twelve billion, two hundred sixty-one million, five hundred seventy-four thousand, one hundred nine".