23123035421 has 4 divisors (see below), whose sum is σ = 23920381500. Its totient is φ = 22325689344.

The previous prime is 23123035409. The next prime is 23123035423. The reversal of 23123035421 is 12453032132.

It is a happy number.

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 14803588900 + 8319446521 = 121670^2 + 91211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23123035421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123035423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398672996 + ... + 398673053.

It is an arithmetic number, because the mean of its divisors is an integer number (5980095375).

Almost surely, 2^23123035421 is an apocalyptic number.

It is an amenable number.

23123035421 is a deficient number, since it is larger than the sum of its proper divisors (797346079).

23123035421 is an equidigital number, since it uses as much as digits as its factorization.

23123035421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797346078.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 23123035421 its reverse (12453032132), we get a palindrome (35576067553).

The spelling of 23123035421 in words is "twenty-three billion, one hundred twenty-three million, thirty-five thousand, four hundred twenty-one".