23031302221 has 2 divisors, whose sum is σ = 23031302222. Its totient is φ = 23031302220.

The previous prime is 23031302183. The next prime is 23031302233. The reversal of 23031302221 is 12220313032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13649248900 + 9382053321 = 116830^2 + 96861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23031302221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23031302291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11515651110 + 11515651111.

It is an arithmetic number, because the mean of its divisors is an integer number (11515651111).

Almost surely, 2^23031302221 is an apocalyptic number.

It is an amenable number.

23031302221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23031302221 is an equidigital number, since it uses as much as digits as its factorization.

23031302221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 23031302221 its reverse (12220313032), we get a palindrome (35251615253).

The spelling of 23031302221 in words is "twenty-three billion, thirty-one million, three hundred two thousand, two hundred twenty-one".