12011011 has 4 divisors (see below), whose sum is σ = 12027400. Its totient is φ = 11994624.

The previous prime is 12011009. The next prime is 12011029. The reversal of 12011011 is 11011021.

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 12011011 - 2¹ = 12011009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12010985 and 12011003.

It is not an unprimeable number, because it can be changed into a prime (12011411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7041 + ... + 8578.

It is an arithmetic number, because the mean of its divisors is an integer number (3006850).

Almost surely, 2^12011011 is an apocalyptic number.

12011011 is a deficient number, since it is larger than the sum of its proper divisors (16389).

12011011 is an equidigital number, since it uses as much as digits as its factorization.

12011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16388.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 12011011 is about 3465.6905516794. The cubic root of 12011011 is about 229.0128518178.

Adding to 12011011 its reverse (11011021), we get a palindrome (23022032).

Multiplying 12011011 by its reverse (11011021), we get a palindrome (132253494352231).

The spelling of 12011011 in words is "twelve million, eleven thousand, eleven".