23123104021 has 4 divisors (see below), whose sum is σ = 23335242700. Its totient is φ = 22910965344.

The previous prime is 23123103961. The next prime is 23123104051. The reversal of 23123104021 is 12040132132.

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 20998908100 + 2124195921 = 144910^2 + 46089^2 .

It is a cyclic number.

It is not a de Polignac number, because 23123104021 - 2¹³ = 23123095829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23123104021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123104051) 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, 106069176 + ... + 106069393.

It is an arithmetic number, because the mean of its divisors is an integer number (5833810675).

Almost surely, 2^23123104021 is an apocalyptic number.

It is an amenable number.

23123104021 is a deficient number, since it is larger than the sum of its proper divisors (212138679).

23123104021 is a wasteful number, since it uses less digits than its factorization.

23123104021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212138678.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 23123104021 its reverse (12040132132), we get a palindrome (35163236153).

The spelling of 23123104021 in words is "twenty-three billion, one hundred twenty-three million, one hundred four thousand, twenty-one".