13220112991 has 2 divisors, whose sum is σ = 13220112992. Its totient is φ = 13220112990.

The previous prime is 13220112977. The next prime is 13220113001. The reversal of 13220112991 is 19921102231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13220112991 - 2⁵ = 13220112959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13220112911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610056495 + 6610056496.

It is an arithmetic number, because the mean of its divisors is an integer number (6610056496).

Almost surely, 2^13220112991 is an apocalyptic number.

13220112991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220112991 is an equidigital number, since it uses as much as digits as its factorization.

13220112991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 13220112991 in words is "thirteen billion, two hundred twenty million, one hundred twelve thousand, nine hundred ninety-one".