113323311221 has 2 divisors, whose sum is σ = 113323311222. Its totient is φ = 113323311220.

The previous prime is 113323311203. The next prime is 113323311253. The reversal of 113323311221 is 122113323311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113308984996 + 14326225 = 336614^2 + 3785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113323311221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113323311121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56661655610 + 56661655611.

It is an arithmetic number, because the mean of its divisors is an integer number (56661655611).

Almost surely, 2^113323311221 is an apocalyptic number.

It is an amenable number.

113323311221 is a deficient number, since it is larger than the sum of its proper divisors (1).

113323311221 is an equidigital number, since it uses as much as digits as its factorization.

113323311221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

Adding to 113323311221 its reverse (122113323311), we get a palindrome (235436634532).

The spelling of 113323311221 in words is "one hundred thirteen billion, three hundred twenty-three million, three hundred eleven thousand, two hundred twenty-one".