20002122303221 has 4 divisors (see below), whose sum is σ = 20002176902892. Its totient is φ = 20002067703552.

The previous prime is 20002122303187. The next prime is 20002122303253. The reversal of 20002122303221 is 12230322120002.

It is a happy number.

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 2468389774321 + 17533732528900 = 1571111^2 + 4187330^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002122303221 - 2⁶ = 20002122303157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002122303193 and 20002122303202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002122303521) 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, 26746586 + ... + 27484251.

It is an arithmetic number, because the mean of its divisors is an integer number (5000544225723).

Almost surely, 2^{20002122303221} is an apocalyptic number.

It is an amenable number.

20002122303221 is a deficient number, since it is larger than the sum of its proper divisors (54599671).

20002122303221 is an equidigital number, since it uses as much as digits as its factorization.

20002122303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54599670.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20002122303221 its reverse (12230322120002), we get a palindrome (32232444423223).

The spelling of 20002122303221 in words is "twenty trillion, two billion, one hundred twenty-two million, three hundred three thousand, two hundred twenty-one".