122100122111 has 4 divisors (see below), whose sum is σ = 133200133224. Its totient is φ = 111000111000.

The previous prime is 122100122093. The next prime is 122100122129. The reversal of 122100122111 is 111221001221.

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

It is an interprime number because it is at equal distance from previous prime (122100122093) and next prime (122100122129).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122100122111 is a prime.

It is a super-2 number, since 2×122100122111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122100122171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5550005540 + ... + 5550005561.

It is an arithmetic number, because the mean of its divisors is an integer number (33300033306).

Almost surely, 2^122100122111 is an apocalyptic number.

122100122111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122100122111 is a deficient number, since it is larger than the sum of its proper divisors (11100011113).

122100122111 is a wasteful number, since it uses less digits than its factorization.

122100122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11100011112.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 122100122111 its reverse (111221001221), we get a palindrome (233321123332).

It can be divided in two parts, 1221001221 and 11, that multiplied together give a palindrome (13431013431).

The spelling of 122100122111 in words is "one hundred twenty-two billion, one hundred million, one hundred twenty-two thousand, one hundred eleven".