13122245891 has 2 divisors, whose sum is σ = 13122245892. Its totient is φ = 13122245890.

The previous prime is 13122245879. The next prime is 13122245921. The reversal of 13122245891 is 19854222131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13122245891 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (13122245831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6561122945 + 6561122946.

It is an arithmetic number, because the mean of its divisors is an integer number (6561122946).

Almost surely, 2^13122245891 is an apocalyptic number.

13122245891 is a deficient number, since it is larger than the sum of its proper divisors (1).

13122245891 is an equidigital number, since it uses as much as digits as its factorization.

13122245891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The spelling of 13122245891 in words is "thirteen billion, one hundred twenty-two million, two hundred forty-five thousand, eight hundred ninety-one".