123421325055 has 16 divisors (see below), whose sum is σ = 225684708864. Its totient is φ = 56421177120.

The previous prime is 123421325051. The next prime is 123421325063. The reversal of 123421325055 is 550523124321.

It is not a de Polignac number, because 123421325055 - 2² = 123421325051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123421325051) 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, 587720491 + ... + 587720700.

It is an arithmetic number, because the mean of its divisors is an integer number (14105294304).

Almost surely, 2^123421325055 is an apocalyptic number.

123421325055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123421325055 is a deficient number, since it is larger than the sum of its proper divisors (102263383809).

123421325055 is a wasteful number, since it uses less digits than its factorization.

123421325055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175441206.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 123421325055 its reverse (550523124321), we get a palindrome (673944449376).

The spelling of 123421325055 in words is "one hundred twenty-three billion, four hundred twenty-one million, three hundred twenty-five thousand, fifty-five".