12207253561 has 2 divisors, whose sum is σ = 12207253562. Its totient is φ = 12207253560.

The previous prime is 12207253517. The next prime is 12207253573. The reversal of 12207253561 is 16535270221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11995725625 + 211527936 = 109525^2 + 14544^2 .

It is an emirp because it is prime and its reverse (16535270221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12207253561 - 2¹¹ = 12207251513 is a prime.

It is not a weakly prime, because it can be changed into another prime (12207254561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6103626780 + 6103626781.

It is an arithmetic number, because the mean of its divisors is an integer number (6103626781).

Almost surely, 2^12207253561 is an apocalyptic number.

It is an amenable number.

12207253561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12207253561 is an equidigital number, since it uses as much as digits as its factorization.

12207253561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 12207253561 in words is "twelve billion, two hundred seven million, two hundred fifty-three thousand, five hundred sixty-one".