123111397159 has 2 divisors, whose sum is σ = 123111397160. Its totient is φ = 123111397158.

The previous prime is 123111397153. The next prime is 123111397187. The reversal of 123111397159 is 951793111321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123111397159 - 2³ = 123111397151 is a prime.

It is a super-2 number, since 2×123111397159² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123111397151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61555698579 + 61555698580.

It is an arithmetic number, because the mean of its divisors is an integer number (61555698580).

Almost surely, 2^123111397159 is an apocalyptic number.

123111397159 is a deficient number, since it is larger than the sum of its proper divisors (1).

123111397159 is an equidigital number, since it uses as much as digits as its factorization.

123111397159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51030, while the sum is 43.

The spelling of 123111397159 in words is "one hundred twenty-three billion, one hundred eleven million, three hundred ninety-seven thousand, one hundred fifty-nine".