123012999999 has 16 divisors (see below), whose sum is σ = 191833139200. Its totient is φ = 77692420728.

The previous prime is 123012999881. The next prime is 123013000039. The reversal of 123012999999 is 999999210321.

It is not a de Polignac number, because 123012999999 - 2⁸ = 123012999743 is a prime.

It is a Duffinian number.

123012999999 is a modest number, since divided by 999999 gives 123012 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123012999799) 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, 119895199 + ... + 119896224.

It is an arithmetic number, because the mean of its divisors is an integer number (11989571200).

Almost surely, 2^123012999999 is an apocalyptic number.

123012999999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

123012999999 is a deficient number, since it is larger than the sum of its proper divisors (68820139201).

123012999999 is a wasteful number, since it uses less digits than its factorization.

123012999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239791451 (or 239791445 counting only the distinct ones).

The product of its (nonzero) digits is 6377292, while the sum is 63.

The spelling of 123012999999 in words is "one hundred twenty-three billion, twelve million, nine hundred ninety-nine thousand, nine hundred ninety-nine".