23210013221 has 2 divisors, whose sum is σ = 23210013222. Its totient is φ = 23210013220.

The previous prime is 23210013191. The next prime is 23210013259. The reversal of 23210013221 is 12231001232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15772848100 + 7437165121 = 125590^2 + 86239^2 .

It is a cyclic number.

It is not a de Polignac number, because 23210013221 - 2⁶ = 23210013157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23210013221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23210003221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11605006610 + 11605006611.

It is an arithmetic number, because the mean of its divisors is an integer number (11605006611).

Almost surely, 2^23210013221 is an apocalyptic number.

It is an amenable number.

23210013221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23210013221 is an equidigital number, since it uses as much as digits as its factorization.

23210013221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 23210013221 its reverse (12231001232), we get a palindrome (35441014453).

The spelling of 23210013221 in words is "twenty-three billion, two hundred ten million, thirteen thousand, two hundred twenty-one".