122211101111 has 4 divisors (see below), whose sum is σ = 133321201224. Its totient is φ = 111101001000.

The previous prime is 122211101101. The next prime is 122211101137. The reversal of 122211101111 is 111101112221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 122211101111 - 2¹⁴ = 122211084727 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 (122211101101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555050040 + ... + 5555050061.

It is an arithmetic number, because the mean of its divisors is an integer number (33330300306).

Almost surely, 2^122211101111 is an apocalyptic number.

122211101111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122211101111 is a deficient number, since it is larger than the sum of its proper divisors (11110100113).

122211101111 is a wasteful number, since it uses less digits than its factorization.

122211101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110100112.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 122211101111 its reverse (111101112221), we get a palindrome (233312213332).

It can be divided in two parts, 12221110 and 1111, that added together give a palindrome (12222221).

The spelling of 122211101111 in words is "one hundred twenty-two billion, two hundred eleven million, one hundred one thousand, one hundred eleven".