20321222113021 has 2 divisors, whose sum is σ = 20321222113022. Its totient is φ = 20321222113020.

The previous prime is 20321222112979. The next prime is 20321222113043. The reversal of 20321222113021 is 12031122212302.

It is an a-pointer prime, because the next prime (20321222113043) can be obtained adding 20321222113021 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19376459496900 + 944762616121 = 4401870^2 + 971989^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321222113021 - 2²⁵ = 20321188558589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20321222112983 and 20321222113001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20321222113081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160611056510 + 10160611056511.

It is an arithmetic number, because the mean of its divisors is an integer number (10160611056511).

Almost surely, 2^{20321222113021} is an apocalyptic number.

It is an amenable number.

20321222113021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321222113021 is an equidigital number, since it uses as much as digits as its factorization.

20321222113021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 20321222113021 its reverse (12031122212302), we get a palindrome (32352344325323).

The spelling of 20321222113021 in words is "twenty trillion, three hundred twenty-one billion, two hundred twenty-two million, one hundred thirteen thousand, twenty-one".