12112112021111 has 2 divisors, whose sum is σ = 12112112021112. Its totient is φ = 12112112021110.

The previous prime is 12112112021101. The next prime is 12112112021117. The reversal of 12112112021111 is 11112021121121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12112112021111 - 2²² = 12112107826807 is a prime.

It is a super-2 number, since 2×12112112021111² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12112112021111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12112112021117) 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 as a sum of consecutive naturals, namely, 6056056010555 + 6056056010556.

It is an arithmetic number, because the mean of its divisors is an integer number (6056056010556).

Almost surely, 2^{12112112021111} is an apocalyptic number.

12112112021111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112112021111 is an equidigital number, since it uses as much as digits as its factorization.

12112112021111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 12112112021111 its reverse (11112021121121), we get a palindrome (23224133142232).

The spelling of 12112112021111 in words is "twelve trillion, one hundred twelve billion, one hundred twelve million, twenty-one thousand, one hundred eleven".