12122201111 has 4 divisors (see below), whose sum is σ = 12132114192. Its totient is φ = 12112288032.

The previous prime is 12122201107. The next prime is 12122201159. The reversal of 12122201111 is 11110222121.

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

It is a cyclic number.

It is not a de Polignac number, because 12122201111 - 2² = 12122201107 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 (12122204111) 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, 4954706 + ... + 4957151.

It is an arithmetic number, because the mean of its divisors is an integer number (3033028548).

Almost surely, 2^12122201111 is an apocalyptic number.

12122201111 is a deficient number, since it is larger than the sum of its proper divisors (9913081).

12122201111 is an equidigital number, since it uses as much as digits as its factorization.

12122201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9913080.

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

Adding to 12122201111 its reverse (11110222121), we get a palindrome (23232423232).

The spelling of 12122201111 in words is "twelve billion, one hundred twenty-two million, two hundred one thousand, one hundred eleven".