23213102221 has 2 divisors, whose sum is σ = 23213102222. Its totient is φ = 23213102220.

The previous prime is 23213102189. The next prime is 23213102299. The reversal of 23213102221 is 12220131232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20596268196 + 2616834025 = 143514^2 + 51155^2 .

It is a cyclic number.

It is not a de Polignac number, because 23213102221 - 2⁵ = 23213102189 is a prime.

It is a super-2 number, since 2×23213102221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23213102621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606551110 + 11606551111.

It is an arithmetic number, because the mean of its divisors is an integer number (11606551111).

Almost surely, 2^23213102221 is an apocalyptic number.

It is an amenable number.

23213102221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23213102221 is an equidigital number, since it uses as much as digits as its factorization.

23213102221 is an evil number, because the sum of its binary digits is even.

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

Adding to 23213102221 its reverse (12220131232), we get a palindrome (35433233453).

The spelling of 23213102221 in words is "twenty-three billion, two hundred thirteen million, one hundred two thousand, two hundred twenty-one".