222211021211 has 4 divisors (see below), whose sum is σ = 223626378192. Its totient is φ = 220795664232.

The previous prime is 222211021199. The next prime is 222211021259. The reversal of 222211021211 is 112120112222.

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-222211021211 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 222211021211.

It is not an unprimeable number, because it can be changed into a prime (222211021111) 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, 707678255 + ... + 707678568.

It is an arithmetic number, because the mean of its divisors is an integer number (55906594548).

Almost surely, 2^222211021211 is an apocalyptic number.

222211021211 is a deficient number, since it is larger than the sum of its proper divisors (1415356981).

222211021211 is a wasteful number, since it uses less digits than its factorization.

222211021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415356980.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 222211021211 its reverse (112120112222), we get a palindrome (334331133433).

The spelling of 222211021211 in words is "two hundred twenty-two billion, two hundred eleven million, twenty-one thousand, two hundred eleven".