12011022111 has 16 divisors (see below), whose sum is σ = 17643558528. Its totient is φ = 7207332000.

The previous prime is 12011022059. The next prime is 12011022113. The reversal of 12011022111 is 11122011021.

It is not a de Polignac number, because 12011022111 - 2⁹ = 12011021599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011022113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1798501 + ... + 1805166.

It is an arithmetic number, because the mean of its divisors is an integer number (1102722408).

Almost surely, 2^12011022111 is an apocalyptic number.

12011022111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12011022111 is a deficient number, since it is larger than the sum of its proper divisors (5632536417).

12011022111 is a wasteful number, since it uses less digits than its factorization.

12011022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603782.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12011022111 its reverse (11122011021), we get a palindrome (23133033132).

The spelling of 12011022111 in words is "twelve billion, eleven million, twenty-two thousand, one hundred eleven".