222202212121 has 4 divisors (see below), whose sum is σ = 222573168000. Its totient is φ = 221831256244.

The previous prime is 222202212077. The next prime is 222202212139. The reversal of 222202212121 is 121212202222.

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 222202212121 - 2¹⁹ = 222201687833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222202212161) 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, 185477041 + ... + 185478238.

It is an arithmetic number, because the mean of its divisors is an integer number (55643292000).

Almost surely, 2^222202212121 is an apocalyptic number.

It is an amenable number.

222202212121 is a deficient number, since it is larger than the sum of its proper divisors (370955879).

222202212121 is an equidigital number, since it uses as much as digits as its factorization.

222202212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370955878.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 222202212121 its reverse (121212202222), we get a palindrome (343414414343).

The spelling of 222202212121 in words is "two hundred twenty-two billion, two hundred two million, two hundred twelve thousand, one hundred twenty-one".