23013123021 has 24 divisors (see below), whose sum is σ = 38338460160. Its totient is φ = 13029706656.

The previous prime is 23013123013. The next prime is 23013123031. The reversal of 23013123021 is 12032131032.

23013123021 is a `hidden beast` number, since 2 + 301 + 312 + 30 + 21 = 666.

It is not a de Polignac number, because 23013123021 - 2³ = 23013123013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23013122985 and 23013123003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23013123031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1668765 + ... + 1682498.

It is an arithmetic number, because the mean of its divisors is an integer number (1597435840).

Almost surely, 2^23013123021 is an apocalyptic number.

23013123021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23013123021 is a deficient number, since it is larger than the sum of its proper divisors (15325337139).

23013123021 is a wasteful number, since it uses less digits than its factorization.

23013123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3351385 (or 3351382 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 23013123021 its reverse (12032131032), we get a palindrome (35045254053).

The spelling of 23013123021 in words is "twenty-three billion, thirteen million, one hundred twenty-three thousand, twenty-one".