23123110021 has 32 divisors (see below), whose sum is σ = 26105587200. Its totient is φ = 20302793280.

The previous prime is 23123110019. The next prime is 23123110027. The reversal of 23123110021 is 12001132132.

It is not a de Polignac number, because 23123110021 - 2¹ = 23123110019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23123109977 and 23123110004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123110027) 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, 10610710 + ... + 10612888.

It is an arithmetic number, because the mean of its divisors is an integer number (815799600).

Almost surely, 2^23123110021 is an apocalyptic number.

It is an amenable number.

23123110021 is a deficient number, since it is larger than the sum of its proper divisors (2982477179).

23123110021 is a wasteful number, since it uses less digits than its factorization.

23123110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 23123110021 its reverse (12001132132), we get a palindrome (35124242153).

The spelling of 23123110021 in words is "twenty-three billion, one hundred twenty-three million, one hundred ten thousand, twenty-one".