122100111 has 48 divisors (see below), whose sum is σ = 211432000. Its totient is φ = 67822272.

The previous prime is 122100107. The next prime is 122100127. The reversal of 122100111 is 111001221.

It is a happy number.

It is not a de Polignac number, because 122100111 - 2² = 122100107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122100093 and 122100102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122100131) 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, 113685 + ... + 114753.

Almost surely, 2^122100111 is an apocalyptic number.

122100111 is a deficient number, since it is larger than the sum of its proper divisors (89331889).

122100111 is a wasteful number, since it uses less digits than its factorization.

122100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 122100111 is about 11049.8918999237. The cubic root of 122100111 is about 496.1031899747.

Adding to 122100111 its reverse (111001221), we get a palindrome (233101332).

The spelling of 122100111 in words is "one hundred twenty-two million, one hundred thousand, one hundred eleven".