12011221333 has 4 divisors (see below), whose sum is σ = 12020762880. Its totient is φ = 12001679788.

The previous prime is 12011221331. The next prime is 12011221337. The reversal of 12011221333 is 33312211021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12011221333 - 2¹ = 12011221331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12011221333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011221331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4768885 + ... + 4771402.

It is an arithmetic number, because the mean of its divisors is an integer number (3005190720).

Almost surely, 2^12011221333 is an apocalyptic number.

It is an amenable number.

12011221333 is a deficient number, since it is larger than the sum of its proper divisors (9541547).

12011221333 is an equidigital number, since it uses as much as digits as its factorization.

12011221333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9541546.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12011221333 its reverse (33312211021), we get a palindrome (45323432354).

The spelling of 12011221333 in words is "twelve billion, eleven million, two hundred twenty-one thousand, three hundred thirty-three".