12011122212111 has 24 divisors (see below), whose sum is σ = 18944659515600. Its totient is φ = 7272528508800.

The previous prime is 12011122212101. The next prime is 12011122212119. The reversal of 12011122212111 is 11121222111021.

It is a happy number.

12011122212111 is a `hidden beast` number, since 120 + 1 + 112 + 221 + 211 + 1 = 666.

It is not a de Polignac number, because 12011122212111 - 2¹⁷ = 12011122081039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011122212119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57724780 + ... + 57932481.

It is an arithmetic number, because the mean of its divisors is an integer number (789360813150).

Almost surely, 2^{12011122212111} is an apocalyptic number.

12011122212111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12011122212111 is a deficient number, since it is larger than the sum of its proper divisors (6933537303489).

12011122212111 is a wasteful number, since it uses less digits than its factorization.

12011122212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115658327 (or 115658324 counting only the distinct ones).

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

Adding to 12011122212111 its reverse (11121222111021), we get a palindrome (23132344323132).

The spelling of 12011122212111 in words is "twelve trillion, eleven billion, one hundred twenty-two million, two hundred twelve thousand, one hundred eleven".