12112121022111 has 32 divisors (see below), whose sum is σ = 20726624217600. Its totient is φ = 6908874733440.

The previous prime is 12112121022091. The next prime is 12112121022121. The reversal of 12112121022111 is 11122012121121.

It is a happy number.

12112121022111 is a `hidden beast` number, since 1 + 211 + 21 + 210 + 221 + 1 + 1 = 666.

It is not a de Polignac number, because 12112121022111 - 2⁶ = 12112121022047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112121022121) 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, 1199452371 + ... + 1199462468.

It is an arithmetic number, because the mean of its divisors is an integer number (647707006800).

Almost surely, 2^{12112121022111} is an apocalyptic number.

12112121022111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12112121022111 is a deficient number, since it is larger than the sum of its proper divisors (8614503195489).

12112121022111 is a wasteful number, since it uses less digits than its factorization.

12112121022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398914876 (or 2398914870 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12112121022111 its reverse (11122012121121), we get a palindrome (23234133143232).

The spelling of 12112121022111 in words is "twelve trillion, one hundred twelve billion, one hundred twenty-one million, twenty-two thousand, one hundred eleven".