12011222011 has 8 divisors (see below), whose sum is σ = 12182362848. Its totient is φ = 11840136000.

The previous prime is 12011221969. The next prime is 12011222063. The reversal of 12011222011 is 11022211021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12011222011 - 2⁷ = 12011221883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011221982 and 12011222000.

It is not an unprimeable number, because it can be changed into a prime (12011222071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662791 + ... + 680671.

It is an arithmetic number, because the mean of its divisors is an integer number (1522795356).

Almost surely, 2^12011222011 is an apocalyptic number.

12011222011 is a deficient number, since it is larger than the sum of its proper divisors (171140837).

12011222011 is an equidigital number, since it uses as much as digits as its factorization.

12011222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27413.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12011222011 its reverse (11022211021), we get a palindrome (23033433032).

The spelling of 12011222011 in words is "twelve billion, eleven million, two hundred twenty-two thousand, eleven".