11213121233 has 4 divisors (see below), whose sum is σ = 11213880228. Its totient is φ = 11212362240.

The previous prime is 11213121229. The next prime is 11213121251. The reversal of 11213121233 is 33212131211.

It is a happy number.

11213121233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33212131211 = 7 ⋅4744590173.

It can be written as a sum of positive squares in 2 ways, for example, as 7260232849 + 3952888384 = 85207^2 + 62872^2 .

It is a cyclic number.

It is not a de Polignac number, because 11213121233 - 2² = 11213121229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11213121133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356888 + ... + 387033.

It is an arithmetic number, because the mean of its divisors is an integer number (2803470057).

Almost surely, 2^11213121233 is an apocalyptic number.

It is an amenable number.

11213121233 is a deficient number, since it is larger than the sum of its proper divisors (758995).

11213121233 is an equidigital number, since it uses as much as digits as its factorization.

11213121233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758994.

The product of its digits is 216, while the sum is 20.

Adding to 11213121233 its reverse (33212131211), we get a palindrome (44425252444).

The spelling of 11213121233 in words is "eleven billion, two hundred thirteen million, one hundred twenty-one thousand, two hundred thirty-three".