20002202221 has 4 divisors (see below), whose sum is σ = 20102716000. Its totient is φ = 19901688444.

The previous prime is 20002202197. The next prime is 20002202239. The reversal of 20002202221 is 12220220002.

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 20002202221 - 2⁵ = 20002202189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002202021) 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, 50256591 + ... + 50256988.

It is an arithmetic number, because the mean of its divisors is an integer number (5025679000).

Almost surely, 2^20002202221 is an apocalyptic number.

It is an amenable number.

20002202221 is a deficient number, since it is larger than the sum of its proper divisors (100513779).

20002202221 is a wasteful number, since it uses less digits than its factorization.

20002202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100513778.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 20002202221 its reverse (12220220002), we get a palindrome (32222422223).

The spelling of 20002202221 in words is "twenty billion, two million, two hundred two thousand, two hundred twenty-one".