123111444499 has 2 divisors, whose sum is σ = 123111444500. Its totient is φ = 123111444498.

The previous prime is 123111444481. The next prime is 123111444557. The reversal of 123111444499 is 994444111321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123111444499 - 2²³ = 123103055891 is a prime.

It is a super-2 number, since 2×123111444499² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123111444199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61555722249 + 61555722250.

It is an arithmetic number, because the mean of its divisors is an integer number (61555722250).

Almost surely, 2^123111444499 is an apocalyptic number.

123111444499 is a deficient number, since it is larger than the sum of its proper divisors (1).

123111444499 is an equidigital number, since it uses as much as digits as its factorization.

123111444499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The spelling of 123111444499 in words is "one hundred twenty-three billion, one hundred eleven million, four hundred forty-four thousand, four hundred ninety-nine".