123201231999 has 8 divisors (see below), whose sum is σ = 168707993520. Its totient is φ = 79914312576.

The previous prime is 123201231971. The next prime is 123201232001. The reversal of 123201231999 is 999132102321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123201231999 - 2¹³ = 123201223807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123201231999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123206231999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554960394 + ... + 554960615.

It is an arithmetic number, because the mean of its divisors is an integer number (21088499190).

Almost surely, 2^123201231999 is an apocalyptic number.

123201231999 is a deficient number, since it is larger than the sum of its proper divisors (45506761521).

123201231999 is a wasteful number, since it uses less digits than its factorization.

123201231999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109921049.

The product of its (nonzero) digits is 52488, while the sum is 42.

The spelling of 123201231999 in words is "one hundred twenty-three billion, two hundred one million, two hundred thirty-one thousand, nine hundred ninety-nine".