23042333021 has 2 divisors, whose sum is σ = 23042333022. Its totient is φ = 23042333020.

The previous prime is 23042332997. The next prime is 23042333023. The reversal of 23042333021 is 12033324032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13494307225 + 9548025796 = 116165^2 + 97714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23042333021 is a prime.

It is a super-2 number, since 2×23042333021² (a number of 22 digits) contains 22 as substring.

Together with 23042333023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23042333023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11521166510 + 11521166511.

It is an arithmetic number, because the mean of its divisors is an integer number (11521166511).

Almost surely, 2^23042333021 is an apocalyptic number.

It is an amenable number.

23042333021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23042333021 is an equidigital number, since it uses as much as digits as its factorization.

23042333021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 23042333021 its reverse (12033324032), we get a palindrome (35075657053).

The spelling of 23042333021 in words is "twenty-three billion, forty-two million, three hundred thirty-three thousand, twenty-one".