123221021120985 has 16 divisors (see below), whose sum is σ = 198898356219264. Its totient is φ = 65136303789312.

The previous prime is 123221021120959. The next prime is 123221021121049. The reversal of 123221021120985 is 589021120122321.

It is a happy number.

It is not a de Polignac number, because 123221021120985 - 2¹⁹ = 123221020596697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36348382117 + ... + 36348385506.

It is an arithmetic number, because the mean of its divisors is an integer number (12431147263704).

Almost surely, 2^{123221021120985} is an apocalyptic number.

123221021120985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123221021120985 is a deficient number, since it is larger than the sum of its proper divisors (75677335098279).

123221021120985 is a wasteful number, since it uses less digits than its factorization.

123221021120985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72696767744.

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 123221021120985 in words is "one hundred twenty-three trillion, two hundred twenty-one billion, twenty-one million, one hundred twenty thousand, nine hundred eighty-five".