122222222111 has 32 divisors (see below), whose sum is σ = 140637482496. Its totient is φ = 105130960000.

The previous prime is 122222222099. The next prime is 122222222141. The reversal of 122222222111 is 111222222221.

It is not a de Polignac number, because 122222222111 - 2⁶ = 122222222047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222222141) 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 31 ways as a sum of consecutive naturals, for example, 49341605 + ... + 49344081.

It is an arithmetic number, because the mean of its divisors is an integer number (4394921328).

Almost surely, 2^122222222111 is an apocalyptic number.

122222222111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122222222111 is a deficient number, since it is larger than the sum of its proper divisors (18415260385).

122222222111 is a wasteful number, since it uses less digits than its factorization.

122222222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543.

The product of its digits is 256, while the sum is 20.

Adding to 122222222111 its reverse (111222222221), we get a palindrome (233444444332).

It can be divided in two parts, 1222222221 and 11, that multiplied together give a palindrome (13444444431).

The spelling of 122222222111 in words is "one hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred eleven".