23444433121 has 4 divisors (see below), whose sum is σ = 23445411012. Its totient is φ = 23443455232.

The previous prime is 23444433079. The next prime is 23444433167. The reversal of 23444433121 is 12133444432.

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 3742380625 + 19702052496 = 61175^2 + 140364^2 .

It is a cyclic number.

It is not a de Polignac number, because 23444433121 - 2⁷ = 23444432993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23444436121) 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, 452056 + ... + 501241.

It is an arithmetic number, because the mean of its divisors is an integer number (5861352753).

Almost surely, 2^23444433121 is an apocalyptic number.

It is an amenable number.

23444433121 is a deficient number, since it is larger than the sum of its proper divisors (977891).

23444433121 is an equidigital number, since it uses as much as digits as its factorization.

23444433121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977890.

The product of its digits is 27648, while the sum is 31.

Adding to 23444433121 its reverse (12133444432), we get a palindrome (35577877553).

The spelling of 23444433121 in words is "twenty-three billion, four hundred forty-four million, four hundred thirty-three thousand, one hundred twenty-one".