23003003021 has 2 divisors, whose sum is σ = 23003003022. Its totient is φ = 23003003020.

The previous prime is 23003002999. The next prime is 23003003027. The reversal of 23003003021 is 12030030032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11824170121 + 11178832900 = 108739^2 + 105730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23003003021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23003002987 and 23003003005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23003003027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11501501510 + 11501501511.

It is an arithmetic number, because the mean of its divisors is an integer number (11501501511).

Almost surely, 2^23003003021 is an apocalyptic number.

It is an amenable number.

23003003021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23003003021 is an equidigital number, since it uses as much as digits as its factorization.

23003003021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 14.

Adding to 23003003021 its reverse (12030030032), we get a palindrome (35033033053).

The spelling of 23003003021 in words is "twenty-three billion, three million, three thousand, twenty-one".