20220000222221 has 4 divisors (see below), whose sum is σ = 20237537083932. Its totient is φ = 20202463360512.

The previous prime is 20220000222211. The next prime is 20220000222223. The reversal of 20220000222221 is 12222200002202.

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 16060497078025 + 4159503144196 = 4007555^2 + 2039486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20220000222221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20220000222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220000222223) 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, 8768429126 + ... + 8768431431.

It is an arithmetic number, because the mean of its divisors is an integer number (5059384270983).

Almost surely, 2^{20220000222221} is an apocalyptic number.

It is an amenable number.

20220000222221 is a deficient number, since it is larger than the sum of its proper divisors (17536861711).

20220000222221 is a wasteful number, since it uses less digits than its factorization.

20220000222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17536861710.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20220000222221 its reverse (12222200002202), we get a palindrome (32442200224423).

The spelling of 20220000222221 in words is "twenty trillion, two hundred twenty billion, two hundred twenty-two thousand, two hundred twenty-one".