11133131221 has 8 divisors (see below), whose sum is σ = 11183328000. Its totient is φ = 11082965040.

The previous prime is 11133131203. The next prime is 11133131227. The reversal of 11133131221 is 12213133111.

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 11133131221 - 2¹⁵ = 11133098453 is a prime.

It is a super-2 number, since 2×11133131221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11133131227) 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, 1034056 + ... + 1044766.

It is an arithmetic number, because the mean of its divisors is an integer number (1397916000).

Almost surely, 2^11133131221 is an apocalyptic number.

It is an amenable number.

11133131221 is a deficient number, since it is larger than the sum of its proper divisors (50196779).

11133131221 is a wasteful number, since it uses less digits than its factorization.

11133131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15299.

The product of its digits is 108, while the sum is 19.

Adding to 11133131221 its reverse (12213133111), we get a palindrome (23346264332).

The spelling of 11133131221 in words is "eleven billion, one hundred thirty-three million, one hundred thirty-one thousand, two hundred twenty-one".