111111122211 has 64 divisors (see below), whose sum is σ = 163281678336. Its totient is φ = 66991795200.

The previous prime is 111111122207. The next prime is 111111122233. The reversal of 111111122211 is 112221111111.

It is not a de Polignac number, because 111111122211 - 2² = 111111122207 is a prime.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (111111122201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28364425 + ... + 28368341.

It is an arithmetic number, because the mean of its divisors is an integer number (2551276224).

Almost surely, 2^111111122211 is an apocalyptic number.

111111122211 is a deficient number, since it is larger than the sum of its proper divisors (52170556125).

111111122211 is a wasteful number, since it uses less digits than its factorization.

111111122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4292.

The product of its digits is 8, while the sum is 15.

Adding to 111111122211 its reverse (112221111111), we get a palindrome (223332233322).

It can be divided in two parts, 11111 and 1122211, that multiplied together give a palindrome (12468886421).

The spelling of 111111122211 in words is "one hundred eleven billion, one hundred eleven million, one hundred twenty-two thousand, two hundred eleven".