123044220112155 has 32 divisors (see below), whose sum is σ = 208459107906048. Its totient is φ = 61761084864000.

The previous prime is 123044220112153. The next prime is 123044220112217. The reversal of 123044220112155 is 551211022440321.

It is not a de Polignac number, because 123044220112155 - 2¹ = 123044220112153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123044220112153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2032521 + ... + 15818330.

It is an arithmetic number, because the mean of its divisors is an integer number (6514347122064).

Almost surely, 2^{123044220112155} is an apocalyptic number.

123044220112155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123044220112155 is a deficient number, since it is larger than the sum of its proper divisors (85414887793893).

123044220112155 is a wasteful number, since it uses less digits than its factorization.

123044220112155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17877907.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 123044220112155 its reverse (551211022440321), we get a palindrome (674255242552476).

The spelling of 123044220112155 in words is "one hundred twenty-three trillion, forty-four billion, two hundred twenty million, one hundred twelve thousand, one hundred fifty-five".