122111112211 has 4 divisors (see below), whose sum is σ = 133212122424. Its totient is φ = 111010102000.

The previous prime is 122111112191. The next prime is 122111112259. The reversal of 122111112211 is 112211111221.

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

It is a cyclic number.

It is not a de Polignac number, because 122111112211 - 2²⁷ = 121976894483 is a prime.

It is a super-2 number, since 2×122111112211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122111112311) 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 3 ways as a sum of consecutive naturals, for example, 5550505090 + ... + 5550505111.

It is an arithmetic number, because the mean of its divisors is an integer number (33303030606).

Almost surely, 2^122111112211 is an apocalyptic number.

122111112211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122111112211 is a deficient number, since it is larger than the sum of its proper divisors (11101010213).

122111112211 is a wasteful number, since it uses less digits than its factorization.

122111112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11101010212.

The product of its digits is 16, while the sum is 16.

Adding to 122111112211 its reverse (112211111221), we get a palindrome (234322223432).

The spelling of 122111112211 in words is "one hundred twenty-two billion, one hundred eleven million, one hundred twelve thousand, two hundred eleven".