123355343553321 has 12 divisors (see below), whose sum is σ = 180785241792176. Its totient is φ = 74760814274520.

The previous prime is 123355343553317. The next prime is 123355343553329.

123355343553321 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 123355343553321 - 2² = 123355343553317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123355343553329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169910941171 + ... + 169910941896.

Almost surely, 2^{123355343553321} is an apocalyptic number.

123355343553321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123355343553321 is a deficient number, since it is larger than the sum of its proper divisors (57429898238855).

123355343553321 is a wasteful number, since it uses less digits than its factorization.

123355343553321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339821883092 (or 339821883081 counting only the distinct ones).

The product of its digits is 7290000, while the sum is 48.

The spelling of 123355343553321 in words is "one hundred twenty-three trillion, three hundred fifty-five billion, three hundred forty-three million, five hundred fifty-three thousand, three hundred twenty-one".