123001120091 has 2 divisors, whose sum is σ = 123001120092. Its totient is φ = 123001120090.

The previous prime is 123001120069. The next prime is 123001120111. The reversal of 123001120091 is 190021100321.

It is an a-pointer prime, because the next prime (123001120111) can be obtained adding 123001120091 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123001120091 is a prime.

It is not a weakly prime, because it can be changed into another prime (123001120001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61500560045 + 61500560046.

It is an arithmetic number, because the mean of its divisors is an integer number (61500560046).

Almost surely, 2^123001120091 is an apocalyptic number.

123001120091 is a deficient number, since it is larger than the sum of its proper divisors (1).

123001120091 is an equidigital number, since it uses as much as digits as its factorization.

123001120091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 123001120091 in words is "one hundred twenty-three billion, one million, one hundred twenty thousand, ninety-one".