12261573361 has 2 divisors, whose sum is σ = 12261573362. Its totient is φ = 12261573360.

The previous prime is 12261573299. The next prime is 12261573413. The reversal of 12261573361 is 16337516221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12250283761 + 11289600 = 110681^2 + 3360^2 .

It is a cyclic number.

It is not a de Polignac number, because 12261573361 - 2³³ = 3671638769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12261573361.

It is not a weakly prime, because it can be changed into another prime (12261573061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6130786680 + 6130786681.

It is an arithmetic number, because the mean of its divisors is an integer number (6130786681).

Almost surely, 2^12261573361 is an apocalyptic number.

It is an amenable number.

12261573361 is a deficient number, since it is larger than the sum of its proper divisors (1).

12261573361 is an equidigital number, since it uses as much as digits as its factorization.

12261573361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The spelling of 12261573361 in words is "twelve billion, two hundred sixty-one million, five hundred seventy-three thousand, three hundred sixty-one".