23122322221 has 2 divisors, whose sum is σ = 23122322222. Its totient is φ = 23122322220.

The previous prime is 23122322219. The next prime is 23122322261. The reversal of 23122322221 is 12222322132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20610909225 + 2511412996 = 143565^2 + 50114^2 .

It is a cyclic number.

It is not a de Polignac number, because 23122322221 - 2¹ = 23122322219 is a prime.

Together with 23122322219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 23122322192 and 23122322201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23122322261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11561161110 + 11561161111.

It is an arithmetic number, because the mean of its divisors is an integer number (11561161111).

Almost surely, 2^23122322221 is an apocalyptic number.

It is an amenable number.

23122322221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23122322221 is an equidigital number, since it uses as much as digits as its factorization.

23122322221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 22.

Adding to 23122322221 its reverse (12222322132), we get a palindrome (35344644353).

The spelling of 23122322221 in words is "twenty-three billion, one hundred twenty-two million, three hundred twenty-two thousand, two hundred twenty-one".