23313201221 has 2 divisors, whose sum is σ = 23313201222. Its totient is φ = 23313201220.

The previous prime is 23313201217. The next prime is 23313201251. The reversal of 23313201221 is 12210231332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14253016996 + 9060184225 = 119386^2 + 95185^2 .

It is a cyclic number.

It is not a de Polignac number, because 23313201221 - 2² = 23313201217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23313201193 and 23313201202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23313201251) 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, 11656600610 + 11656600611.

It is an arithmetic number, because the mean of its divisors is an integer number (11656600611).

Almost surely, 2^23313201221 is an apocalyptic number.

It is an amenable number.

23313201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23313201221 is an equidigital number, since it uses as much as digits as its factorization.

23313201221 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 23313201221 its reverse (12210231332), we get a palindrome (35523432553).

The spelling of 23313201221 in words is "twenty-three billion, three hundred thirteen million, two hundred one thousand, two hundred twenty-one".