122111200111 has 16 divisors (see below), whose sum is σ = 129575255040. Its totient is φ = 114754570560.

The previous prime is 122111200109. The next prime is 122111200129. The reversal of 122111200111 is 111002111221.

It is a happy number.

It is not a de Polignac number, because 122111200111 - 2¹ = 122111200109 is a prime.

It is a super-2 number, since 2×122111200111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122111200091 and 122111200100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122111209111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1139316 + ... + 1241878.

It is an arithmetic number, because the mean of its divisors is an integer number (8098453440).

Almost surely, 2^122111200111 is an apocalyptic number.

122111200111 is a deficient number, since it is larger than the sum of its proper divisors (7464054929).

122111200111 is a wasteful number, since it uses less digits than its factorization.

122111200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103086.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 122111200111 its reverse (111002111221), we get a palindrome (233113311332).

The spelling of 122111200111 in words is "one hundred twenty-two billion, one hundred eleven million, two hundred thousand, one hundred eleven".