222211212211111 has 4 divisors (see below), whose sum is σ = 231872569263792. Its totient is φ = 212549855158432.

The previous prime is 222211212211067. The next prime is 222211212211141. The reversal of 222211212211111 is 111112212112222.

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

It is a cyclic number.

It is not a de Polignac number, because 222211212211111 - 2⁷ = 222211212210983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222211212211141) 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, 4830678526306 + ... + 4830678526351.

It is an arithmetic number, because the mean of its divisors is an integer number (57968142315948).

Almost surely, 2^{222211212211111} is an apocalyptic number.

222211212211111 is a deficient number, since it is larger than the sum of its proper divisors (9661357052681).

222211212211111 is an equidigital number, since it uses as much as digits as its factorization.

222211212211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9661357052680.

The product of its digits is 128, while the sum is 22.

Adding to 222211212211111 its reverse (111112212112222), we get a palindrome (333323424323333).

The spelling of 222211212211111 in words is "two hundred twenty-two trillion, two hundred eleven billion, two hundred twelve million, two hundred eleven thousand, one hundred eleven".