12122100111 has 32 divisors (see below), whose sum is σ = 18569134080. Its totient is φ = 6956690400.

The previous prime is 12122100101. The next prime is 12122100157. The reversal of 12122100111 is 11100122121.

It is not a de Polignac number, because 12122100111 - 2⁶ = 12122100047 is a prime.

It is a super-2 number, since 2×12122100111² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122100101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1929906 + ... + 1936176.

It is an arithmetic number, because the mean of its divisors is an integer number (580285440).

Almost surely, 2^12122100111 is an apocalyptic number.

12122100111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12122100111 is a deficient number, since it is larger than the sum of its proper divisors (6447033969).

12122100111 is a wasteful number, since it uses less digits than its factorization.

12122100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9387.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12122100111 its reverse (11100122121), we get a palindrome (23222222232).

The spelling of 12122100111 in words is "twelve billion, one hundred twenty-two million, one hundred thousand, one hundred eleven".