1222211122111 has 16 divisors (see below), whose sum is σ = 1397983150080. Its totient is φ = 1046732045760.

The previous prime is 1222211122091. The next prime is 1222211122159. The reversal of 1222211122111 is 1112211122221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1222211122111 - 2²³ = 1222202733503 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 (1222211422111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54867906 + ... + 54890176.

It is an arithmetic number, because the mean of its divisors is an integer number (87373946880).

Almost surely, 2^{1222211122111} is an apocalyptic number.

1222211122111 is a deficient number, since it is larger than the sum of its proper divisors (175772027969).

1222211122111 is a wasteful number, since it uses less digits than its factorization.

1222211122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28494.

The product of its digits is 64, while the sum is 19.

Adding to 1222211122111 its reverse (1112211122221), we get a palindrome (2334422244332).

The spelling of 1222211122111 in words is "one trillion, two hundred twenty-two billion, two hundred eleven million, one hundred twenty-two thousand, one hundred eleven".