222121020211 has 4 divisors (see below), whose sum is σ = 222664103800. Its totient is φ = 221577936624.

The previous prime is 222121020181. The next prime is 222121020221. The reversal of 222121020211 is 112020121222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222121020211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222121020221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271541181 + ... + 271541998.

It is an arithmetic number, because the mean of its divisors is an integer number (55666025950).

Almost surely, 2^222121020211 is an apocalyptic number.

222121020211 is a deficient number, since it is larger than the sum of its proper divisors (543083589).

222121020211 is an equidigital number, since it uses as much as digits as its factorization.

222121020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543083588.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222121020211 its reverse (112020121222), we get a palindrome (334141141433).

The spelling of 222121020211 in words is "two hundred twenty-two billion, one hundred twenty-one million, twenty thousand, two hundred eleven".