123112019 has 2 divisors, whose sum is σ = 123112020. Its totient is φ = 123112018.

The previous prime is 123111979. The next prime is 123112051. The reversal of 123112019 is 910211321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123112019 - 2²⁴ = 106334803 is a prime.

It is a super-2 number, since 2×123112019² = 30313138444512722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123112519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61556009 + 61556010.

It is an arithmetic number, because the mean of its divisors is an integer number (61556010).

Almost surely, 2^123112019 is an apocalyptic number.

123112019 is a deficient number, since it is larger than the sum of its proper divisors (1).

123112019 is an equidigital number, since it uses as much as digits as its factorization.

123112019 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 square root of 123112019 is about 11095.5855636375. The cubic root of 123112019 is about 497.4699108929.

The spelling of 123112019 in words is "one hundred twenty-three million, one hundred twelve thousand, nineteen".