20002012202221 has 4 divisors (see below), whose sum is σ = 22859442516832. Its totient is φ = 17144581887612.

The previous prime is 20002012202203. The next prime is 20002012202231. The reversal of 20002012202221 is 12220221020002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20002012202221 - 2²⁹ = 20001475331309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002012202195 and 20002012202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002012202231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428715157295 + ... + 1428715157308.

It is an arithmetic number, because the mean of its divisors is an integer number (5714860629208).

Almost surely, 2^{20002012202221} is an apocalyptic number.

It is an amenable number.

20002012202221 is a deficient number, since it is larger than the sum of its proper divisors (2857430314611).

20002012202221 is an equidigital number, since it uses as much as digits as its factorization.

20002012202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857430314610.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20002012202221 its reverse (12220221020002), we get a palindrome (32222233222223).

The spelling of 20002012202221 in words is "twenty trillion, two billion, twelve million, two hundred two thousand, two hundred twenty-one".