11211221133 has 24 divisors (see below), whose sum is σ = 18768087936. Its totient is φ = 6316178400.

The previous prime is 11211221101. The next prime is 11211221137. The reversal of 11211221133 is 33112211211.

11211221133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11211221133 - 2⁵ = 11211221101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211221137) 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 23 ways as a sum of consecutive naturals, for example, 1248738 + ... + 1257683.

It is an arithmetic number, because the mean of its divisors is an integer number (782003664).

Almost surely, 2^11211221133 is an apocalyptic number.

It is an amenable number.

11211221133 is a deficient number, since it is larger than the sum of its proper divisors (7556866803).

11211221133 is a wasteful number, since it uses less digits than its factorization.

11211221133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506505 (or 2506502 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11211221133 its reverse (33112211211), we get a palindrome (44323432344).

The spelling of 11211221133 in words is "eleven billion, two hundred eleven million, two hundred twenty-one thousand, one hundred thirty-three".