222202122221 has 4 divisors (see below), whose sum is σ = 223318716000. Its totient is φ = 221085528444.

The previous prime is 222202122209. The next prime is 222202122277. The reversal of 222202122221 is 122221202222.

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 222202122221 - 2³⁰ = 221128380397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222202122193 and 222202122202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222202122281) 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, 558296591 + ... + 558296988.

It is an arithmetic number, because the mean of its divisors is an integer number (55829679000).

Almost surely, 2^222202122221 is an apocalyptic number.

It is an amenable number.

222202122221 is a deficient number, since it is larger than the sum of its proper divisors (1116593779).

222202122221 is a wasteful number, since it uses less digits than its factorization.

222202122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116593778.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 222202122221 its reverse (122221202222), we get a palindrome (344423324443).

The spelling of 222202122221 in words is "two hundred twenty-two billion, two hundred two million, one hundred twenty-two thousand, two hundred twenty-one".