20321223113 has 2 divisors, whose sum is σ = 20321223114. Its totient is φ = 20321223112.

The previous prime is 20321223077. The next prime is 20321223151. The reversal of 20321223113 is 31132212302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15020218249 + 5301004864 = 122557^2 + 72808^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321223113 - 2²⁴ = 20304445897 is a prime.

It is not a weakly prime, because it can be changed into another prime (20321223193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160611556 + 10160611557.

It is an arithmetic number, because the mean of its divisors is an integer number (10160611557).

Almost surely, 2^20321223113 is an apocalyptic number.

It is an amenable number.

20321223113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321223113 is an equidigital number, since it uses as much as digits as its factorization.

20321223113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20321223113 its reverse (31132212302), we get a palindrome (51453435415).

The spelling of 20321223113 in words is "twenty billion, three hundred twenty-one million, two hundred twenty-three thousand, one hundred thirteen".