123423822521 has 16 divisors (see below), whose sum is σ = 131104122240. Its totient is φ = 115862503680.

The previous prime is 123423822497. The next prime is 123423822527. The reversal of 123423822521 is 125228324321.

It is a cyclic number.

It is not a de Polignac number, because 123423822521 - 2¹⁴ = 123423806137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123423822527) 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, 16255436 + ... + 16263026.

It is an arithmetic number, because the mean of its divisors is an integer number (8194007640).

Almost surely, 2^123423822521 is an apocalyptic number.

It is an amenable number.

123423822521 is a deficient number, since it is larger than the sum of its proper divisors (7680299719).

123423822521 is a wasteful number, since it uses less digits than its factorization.

123423822521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15296.

The product of its digits is 46080, while the sum is 35.

The spelling of 123423822521 in words is "one hundred twenty-three billion, four hundred twenty-three million, eight hundred twenty-two thousand, five hundred twenty-one".