222221101211 has 4 divisors (see below), whose sum is σ = 235292930712. Its totient is φ = 209149271712.

The previous prime is 222221101199. The next prime is 222221101213. The reversal of 222221101211 is 112101122222.

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

It is not a de Polignac number, because 222221101211 - 2²² = 222216906907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 13071829483 = 222221101211 / (2 + 2 + 2 + 2 + 2 + 1 + 1 + 0 + 1 + 2 + 1 + 1).

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 222221101211.

It is not an unprimeable number, because it can be changed into a prime (222221101213) 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, 6535914725 + ... + 6535914758.

It is an arithmetic number, because the mean of its divisors is an integer number (58823232678).

Almost surely, 2^222221101211 is an apocalyptic number.

222221101211 is a deficient number, since it is larger than the sum of its proper divisors (13071829501).

222221101211 is a wasteful number, since it uses less digits than its factorization.

222221101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13071829500.

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

Adding to 222221101211 its reverse (112101122222), we get a palindrome (334322223433).

The spelling of 222221101211 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred one thousand, two hundred eleven".