11333121221 has 8 divisors (see below), whose sum is σ = 11616163104. Its totient is φ = 11053429200.

The previous prime is 11333121193. The next prime is 11333121227. The reversal of 11333121221 is 12212133311.

It is a happy number.

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 11333121221 - 2⁶ = 11333121157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11333121193 and 11333121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11333121227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830615 + ... + 844148.

It is an arithmetic number, because the mean of its divisors is an integer number (1452020388).

Almost surely, 2^11333121221 is an apocalyptic number.

It is an amenable number.

11333121221 is a deficient number, since it is larger than the sum of its proper divisors (283041883).

11333121221 is a wasteful number, since it uses less digits than its factorization.

11333121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674931.

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

Adding to 11333121221 its reverse (12212133311), we get a palindrome (23545254532).

The spelling of 11333121221 in words is "eleven billion, three hundred thirty-three million, one hundred twenty-one thousand, two hundred twenty-one".