23040442121 has 4 divisors (see below), whose sum is σ = 23041445700. Its totient is φ = 23039438544.

The previous prime is 23040442081. The next prime is 23040442129. The reversal of 23040442121 is 12124404032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14178855625 + 8861586496 = 119075^2 + 94136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23040442121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23040442129) 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, 466526 + ... + 513543.

It is an arithmetic number, because the mean of its divisors is an integer number (5760361425).

Almost surely, 2^23040442121 is an apocalyptic number.

It is an amenable number.

23040442121 is a deficient number, since it is larger than the sum of its proper divisors (1003579).

23040442121 is an equidigital number, since it uses as much as digits as its factorization.

23040442121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003578.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 23040442121 its reverse (12124404032), we get a palindrome (35164846153).

The spelling of 23040442121 in words is "twenty-three billion, forty million, four hundred forty-two thousand, one hundred twenty-one".