122101111 has 4 divisors (see below), whose sum is σ = 133201224. Its totient is φ = 111001000.

The previous prime is 122101099. The next prime is 122101117. The reversal of 122101111 is 111101221.

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

It is not a de Polignac number, because 122101111 - 2⁵ = 122101079 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 (122101117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5550040 + ... + 5550061.

It is an arithmetic number, because the mean of its divisors is an integer number (33300306).

Almost surely, 2^122101111 is an apocalyptic number.

122101111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122101111 is a deficient number, since it is larger than the sum of its proper divisors (11100113).

122101111 is a wasteful number, since it uses less digits than its factorization.

122101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11100112.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 122101111 is about 11049.9371491425. The cubic root of 122101111 is about 496.1045443328.

Adding to 122101111 its reverse (111101221), we get a palindrome (233202332).

The spelling of 122101111 in words is "one hundred twenty-two million, one hundred one thousand, one hundred eleven".