222202020221 has 4 divisors (see below), whose sum is σ = 225518468352. Its totient is φ = 218885572092.

The previous prime is 222202020203. The next prime is 222202020233. The reversal of 222202020221 is 122020202222.

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 a de Polignac number, because none of the positive numbers 2^k-222202020221 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 222202020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222202620221) 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, 1658223965 + ... + 1658224098.

It is an arithmetic number, because the mean of its divisors is an integer number (56379617088).

Almost surely, 2^222202020221 is an apocalyptic number.

It is an amenable number.

222202020221 is a deficient number, since it is larger than the sum of its proper divisors (3316448131).

222202020221 is an equidigital number, since it uses as much as digits as its factorization.

222202020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3316448130.

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

Adding to 222202020221 its reverse (122020202222), we get a palindrome (344222222443).

The spelling of 222202020221 in words is "two hundred twenty-two billion, two hundred two million, twenty thousand, two hundred twenty-one".