123312321019 has 2 divisors, whose sum is σ = 123312321020. Its totient is φ = 123312321018.

The previous prime is 123312320993. The next prime is 123312321043. The reversal of 123312321019 is 910123213321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123312321019 - 2¹⁷ = 123312189947 is a prime.

It is a super-2 number, since 2×123312321019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123312321719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61656160509 + 61656160510.

It is an arithmetic number, because the mean of its divisors is an integer number (61656160510).

Almost surely, 2^123312321019 is an apocalyptic number.

123312321019 is a deficient number, since it is larger than the sum of its proper divisors (1).

123312321019 is an equidigital number, since it uses as much as digits as its factorization.

123312321019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 123312321019 in words is "one hundred twenty-three billion, three hundred twelve million, three hundred twenty-one thousand, nineteen".