123255405451121 has 32 divisors (see below), whose sum is σ = 134426505356928. Its totient is φ = 112570343142400.

The previous prime is 123255405451081. The next prime is 123255405451151. The reversal of 123255405451121 is 121154504552321.

It is a cyclic number.

It is not a de Polignac number, because 123255405451121 - 2¹⁰ = 123255405450097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123255405451151) 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, 85462826 + ... + 86893068.

It is an arithmetic number, because the mean of its divisors is an integer number (4200828292404).

Almost surely, 2^{123255405451121} is an apocalyptic number.

It is an amenable number.

123255405451121 is a deficient number, since it is larger than the sum of its proper divisors (11171099905807).

123255405451121 is a wasteful number, since it uses less digits than its factorization.

123255405451121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431361.

The product of its (nonzero) digits is 240000, while the sum is 41.

The spelling of 123255405451121 in words is "one hundred twenty-three trillion, two hundred fifty-five billion, four hundred five million, four hundred fifty-one thousand, one hundred twenty-one".