23122231021 has 2 divisors, whose sum is σ = 23122231022. Its totient is φ = 23122231020.

The previous prime is 23122231003. The next prime is 23122231103. The reversal of 23122231021 is 12013222132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22804322121 + 317908900 = 151011^2 + 17830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23122231021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23122231021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23122231921) 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, 11561115510 + 11561115511.

It is an arithmetic number, because the mean of its divisors is an integer number (11561115511).

Almost surely, 2^23122231021 is an apocalyptic number.

It is an amenable number.

23122231021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23122231021 is an equidigital number, since it uses as much as digits as its factorization.

23122231021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 23122231021 its reverse (12013222132), we get a palindrome (35135453153).

The spelling of 23122231021 in words is "twenty-three billion, one hundred twenty-two million, two hundred thirty-one thousand, twenty-one".