12112100221111 has 4 divisors (see below), whose sum is σ = 13213200241224. Its totient is φ = 11011000201000.

The previous prime is 12112100221097. The next prime is 12112100221127. The reversal of 12112100221111 is 11112200121121.

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 12112100221111 - 2²⁹ = 12111563350199 is a prime.

It is a super-4 number, since 4×12112100221111⁴ (a number of 53 digits) contains 4444 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 (12112100227111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550550010040 + ... + 550550010061.

It is an arithmetic number, because the mean of its divisors is an integer number (3303300060306).

Almost surely, 2^{12112100221111} is an apocalyptic number.

12112100221111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12112100221111 is a deficient number, since it is larger than the sum of its proper divisors (1101100020113).

12112100221111 is a wasteful number, since it uses less digits than its factorization.

12112100221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101100020112.

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

Adding to 12112100221111 its reverse (11112200121121), we get a palindrome (23224300342232).

The spelling of 12112100221111 in words is "twelve trillion, one hundred twelve billion, one hundred million, two hundred twenty-one thousand, one hundred eleven".