122221122111 has 48 divisors (see below), whose sum is σ = 197144019072. Its totient is φ = 72323496000.

The previous prime is 122221122083. The next prime is 122221122119. The reversal of 122221122111 is 111221122221.

122221122111 is a `hidden beast` number, since 1 + 222 + 211 + 221 + 11 = 666.

It is not a de Polignac number, because 122221122111 - 2¹⁵ = 122221089343 is a prime.

It is a super-3 number, since 3×122221122111³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221122119) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19796221 + ... + 19802393.

It is an arithmetic number, because the mean of its divisors is an integer number (4107167064).

Almost surely, 2^122221122111 is an apocalyptic number.

122221122111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122221122111 is a deficient number, since it is larger than the sum of its proper divisors (74922896961).

122221122111 is a wasteful number, since it uses less digits than its factorization.

122221122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10884 (or 10881 counting only the distinct ones).

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

Adding to 122221122111 its reverse (111221122221), we get a palindrome (233442244332).

The spelling of 122221122111 in words is "one hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred eleven".