123122220130991 has 2 divisors, whose sum is σ = 123122220130992. Its totient is φ = 123122220130990.

The previous prime is 123122220130957. The next prime is 123122220131041. The reversal of 123122220130991 is 199031022221321.

It is a weak prime.

It is an emirp because it is prime and its reverse (199031022221321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123122220130991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123122220138991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61561110065495 + 61561110065496.

It is an arithmetic number, because the mean of its divisors is an integer number (61561110065496).

Almost surely, 2^{123122220130991} is an apocalyptic number.

123122220130991 is a deficient number, since it is larger than the sum of its proper divisors (1).

123122220130991 is an equidigital number, since it uses as much as digits as its factorization.

123122220130991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 123122220130991 in words is "one hundred twenty-three trillion, one hundred twenty-two billion, two hundred twenty million, one hundred thirty thousand, nine hundred ninety-one".