222011111 has 12 divisors (see below), whose sum is σ = 269487792. Its totient is φ = 182020608.

The previous prime is 222011089. The next prime is 222011129. The reversal of 222011111 is 111110222.

It is not a de Polignac number, because 222011111 - 2⁶ = 222011047 is a prime.

222011111 is a modest number, since divided by 11111 gives 2220 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 222011092 and 222011101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222011131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97370 + ... + 99623.

It is an arithmetic number, because the mean of its divisors is an integer number (22457316).

Almost surely, 2^222011111 is an apocalyptic number.

222011111 is a deficient number, since it is larger than the sum of its proper divisors (47476681).

222011111 is a wasteful number, since it uses less digits than its factorization.

222011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197030 (or 197023 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 222011111 is about 14900.0372818326. The cubic root of 222011111 is about 605.5149962317.

Adding to 222011111 its reverse (111110222), we get a palindrome (333121333).

It can be divided in two parts, 2220 and 11111, that added together give a palindrome (13331).

The spelling of 222011111 in words is "two hundred twenty-two million, eleven thousand, one hundred eleven".