23213320121 has 2 divisors, whose sum is σ = 23213320122. Its totient is φ = 23213320120.

The previous prime is 23213320057. The next prime is 23213320177. The reversal of 23213320121 is 12102331232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17939655721 + 5273664400 = 133939^2 + 72620^2 .

It is a cyclic number.

It is not a de Polignac number, because 23213320121 - 2⁶ = 23213320057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23213320093 and 23213320102.

It is not a weakly prime, because it can be changed into another prime (23213328121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606660060 + 11606660061.

It is an arithmetic number, because the mean of its divisors is an integer number (11606660061).

Almost surely, 2^23213320121 is an apocalyptic number.

It is an amenable number.

23213320121 is a deficient number, since it is larger than the sum of its proper divisors (1).

23213320121 is an equidigital number, since it uses as much as digits as its factorization.

23213320121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23213320121 its reverse (12102331232), we get a palindrome (35315651353).

The spelling of 23213320121 in words is "twenty-three billion, two hundred thirteen million, three hundred twenty thousand, one hundred twenty-one".