13226188861 has 2 divisors, whose sum is σ = 13226188862. Its totient is φ = 13226188860.

The previous prime is 13226188799. The next prime is 13226188873. The reversal of 13226188861 is 16888162231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11860516836 + 1365672025 = 108906^2 + 36955^2 .

It is a cyclic number.

It is not a de Polignac number, because 13226188861 - 2²¹ = 13224091709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13226180861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6613094430 + 6613094431.

It is an arithmetic number, because the mean of its divisors is an integer number (6613094431).

Almost surely, 2^13226188861 is an apocalyptic number.

It is an amenable number.

13226188861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13226188861 is an equidigital number, since it uses as much as digits as its factorization.

13226188861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 46.

It can be divided in two parts, 132261 and 88861, that added together give a palindrome (221122).

The spelling of 13226188861 in words is "thirteen billion, two hundred twenty-six million, one hundred eighty-eight thousand, eight hundred sixty-one".