222202202021 has 4 divisors (see below), whose sum is σ = 222221716812. Its totient is φ = 222182687232.

The previous prime is 222202202011. The next prime is 222202202029. The reversal of 222202202021 is 120202202222.

222202202021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 101021629921 + 121180572100 = 317839^2 + 348110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222202202021 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 (222202202029) 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, 9740306 + ... + 9763091.

It is an arithmetic number, because the mean of its divisors is an integer number (55555429203).

Almost surely, 2^222202202021 is an apocalyptic number.

It is an amenable number.

222202202021 is a deficient number, since it is larger than the sum of its proper divisors (19514791).

222202202021 is a wasteful number, since it uses less digits than its factorization.

222202202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19514790.

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

Adding to 222202202021 its reverse (120202202222), we get a palindrome (342404404243).

The spelling of 222202202021 in words is "two hundred twenty-two billion, two hundred two million, two hundred two thousand, twenty-one".