20321222113013 has 4 divisors (see below), whose sum is σ = 20321437810188. Its totient is φ = 20321006415840.

The previous prime is 20321222112979. The next prime is 20321222113021. The reversal of 20321222113013 is 31031122212302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20253042114244 + 68179998769 = 4500338^2 + 261113^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321222113013 - 2²⁴ = 20321205335797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20321222113013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321222113043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107707208 + ... + 107895713.

It is an arithmetic number, because the mean of its divisors is an integer number (5080359452547).

Almost surely, 2^{20321222113013} is an apocalyptic number.

It is an amenable number.

20321222113013 is a deficient number, since it is larger than the sum of its proper divisors (215697175).

20321222113013 is an equidigital number, since it uses as much as digits as its factorization.

20321222113013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215697174.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20321222113013 its reverse (31031122212302), we get a palindrome (51352344325315).

The spelling of 20321222113013 in words is "twenty trillion, three hundred twenty-one billion, two hundred twenty-two million, one hundred thirteen thousand, thirteen".