222001111 has 4 divisors (see below), whose sum is σ = 233685400. Its totient is φ = 210316824.

The previous prime is 222001099. The next prime is 222001121. The reversal of 222001111 is 111100222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111100222 = 2 ⋅55550111.

It is a cyclic number.

It is not a de Polignac number, because 222001111 - 2¹⁵ = 221968343 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222001121) 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, 5842116 + ... + 5842153.

It is an arithmetic number, because the mean of its divisors is an integer number (58421350).

Almost surely, 2^222001111 is an apocalyptic number.

222001111 is a deficient number, since it is larger than the sum of its proper divisors (11684289).

222001111 is a wasteful number, since it uses less digits than its factorization.

222001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11684288.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 222001111 is about 14899.7017084236. The cubic root of 222001111 is about 605.5059047334.

Adding to 222001111 its reverse (111100222), we get a palindrome (333101333).

The spelling of 222001111 in words is "two hundred twenty-two million, one thousand, one hundred eleven".