23441221021 has 2 divisors, whose sum is σ = 23441221022. Its totient is φ = 23441221020.

The previous prime is 23441221007. The next prime is 23441221033. The reversal of 23441221021 is 12012214432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23032615225 + 408605796 = 151765^2 + 20214^2 .

It is a cyclic number.

It is not a de Polignac number, because 23441221021 - 2³¹ = 21293737373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23441220983 and 23441221001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23441221061) 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, 11720610510 + 11720610511.

It is an arithmetic number, because the mean of its divisors is an integer number (11720610511).

Almost surely, 2^23441221021 is an apocalyptic number.

It is an amenable number.

23441221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23441221021 is an equidigital number, since it uses as much as digits as its factorization.

23441221021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 23441221021 its reverse (12012214432), we get a palindrome (35453435453).

The spelling of 23441221021 in words is "twenty-three billion, four hundred forty-one million, two hundred twenty-one thousand, twenty-one".