23403133121 has 4 divisors (see below), whose sum is σ = 24420660672. Its totient is φ = 22385605572.

The previous prime is 23403133073. The next prime is 23403133123. The reversal of 23403133121 is 12133130432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23403133121 - 2²² = 23398938817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1017527527 = 23403133121 / (2 + 3 + 4 + 0 + 3 + 1 + 3 + 3 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23403133123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508763741 + ... + 508763786.

It is an arithmetic number, because the mean of its divisors is an integer number (6105165168).

Almost surely, 2^23403133121 is an apocalyptic number.

It is an amenable number.

23403133121 is a deficient number, since it is larger than the sum of its proper divisors (1017527551).

23403133121 is a wasteful number, since it uses less digits than its factorization.

23403133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017527550.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 23403133121 its reverse (12133130432), we get a palindrome (35536263553).

The spelling of 23403133121 in words is "twenty-three billion, four hundred three million, one hundred thirty-three thousand, one hundred twenty-one".