23013213221 has 2 divisors, whose sum is σ = 23013213222. Its totient is φ = 23013213220.

The previous prime is 23013213187. The next prime is 23013213229. The reversal of 23013213221 is 12231231032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13692276196 + 9320937025 = 117014^2 + 96545^2 .

It is a cyclic number.

It is not a de Polignac number, because 23013213221 - 2¹⁸ = 23012951077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23013213193 and 23013213202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23013213229) 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, 11506606610 + 11506606611.

It is an arithmetic number, because the mean of its divisors is an integer number (11506606611).

Almost surely, 2^23013213221 is an apocalyptic number.

It is an amenable number.

23013213221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23013213221 is an equidigital number, since it uses as much as digits as its factorization.

23013213221 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 20.

Adding to 23013213221 its reverse (12231231032), we get a palindrome (35244444253).

The spelling of 23013213221 in words is "twenty-three billion, thirteen million, two hundred thirteen thousand, two hundred twenty-one".