123231312301999 has 16 divisors (see below), whose sum is σ = 142343833558176. Its totient is φ = 105437235251200.

The previous prime is 123231312301987. The next prime is 123231312302023. The reversal of 123231312301999 is 999103213132321.

It is a cyclic number.

It is not a de Polignac number, because 123231312301999 - 2¹⁹ = 123231311777711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123231312301919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10989159 + ... + 19163095.

It is an arithmetic number, because the mean of its divisors is an integer number (8896489597386).

Almost surely, 2^{123231312301999} is an apocalyptic number.

123231312301999 is a deficient number, since it is larger than the sum of its proper divisors (19112521256177).

123231312301999 is a wasteful number, since it uses less digits than its factorization.

123231312301999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8254586.

The product of its (nonzero) digits is 472392, while the sum is 49.

The spelling of 123231312301999 in words is "one hundred twenty-three trillion, two hundred thirty-one billion, three hundred twelve million, three hundred one thousand, nine hundred ninety-nine".