122211311111 has 16 divisors (see below), whose sum is σ = 130223829600. Its totient is φ = 114359528448.

The previous prime is 122211311099. The next prime is 122211311119. The reversal of 122211311111 is 111113112221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122211311111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122211311111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122211311119) 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 15 ways as a sum of consecutive naturals, for example, 1615121 + ... + 1689093.

It is an arithmetic number, because the mean of its divisors is an integer number (8138989350).

Almost surely, 2^122211311111 is an apocalyptic number.

122211311111 is a deficient number, since it is larger than the sum of its proper divisors (8012518489).

122211311111 is an equidigital number, since it uses as much as digits as its factorization.

122211311111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75058.

The product of its digits is 24, while the sum is 17.

Adding to 122211311111 its reverse (111113112221), we get a palindrome (233324423332).

The spelling of 122211311111 in words is "one hundred twenty-two billion, two hundred eleven million, three hundred eleven thousand, one hundred eleven".