122211222111 has 96 divisors (see below), whose sum is σ = 200998324800. Its totient is φ = 70901360640.

The previous prime is 122211222109. The next prime is 122211222121. The reversal of 122211222111 is 111222112221.

122211222111 is a `hidden beast` number, since 122 + 211 + 222 + 111 = 666.

It is not a de Polignac number, because 122211222111 - 2¹ = 122211222109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122211222121) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 74654785 + ... + 74656421.

It is an arithmetic number, because the mean of its divisors is an integer number (2093732550).

Almost surely, 2^122211222111 is an apocalyptic number.

122211222111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122211222111 is a deficient number, since it is larger than the sum of its proper divisors (78787102689).

122211222111 is a wasteful number, since it uses less digits than its factorization.

122211222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009 (or 2006 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

Adding to 122211222111 its reverse (111222112221), we get a palindrome (233433334332).

It can be divided in two parts, 1222112221 and 11, that multiplied together give a palindrome (13443234431).

The spelling of 122211222111 in words is "one hundred twenty-two billion, two hundred eleven million, two hundred twenty-two thousand, one hundred eleven".