11331033221 has 4 divisors (see below), whose sum is σ = 11367942432. Its totient is φ = 11294124012.

The previous prime is 11331033167. The next prime is 11331033229. The reversal of 11331033221 is 12233013311.

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 11331033221 - 2¹⁰ = 11331032197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11331033193 and 11331033202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331033229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18454145 + ... + 18454758.

It is an arithmetic number, because the mean of its divisors is an integer number (2841985608).

Almost surely, 2^11331033221 is an apocalyptic number.

It is an amenable number.

11331033221 is a deficient number, since it is larger than the sum of its proper divisors (36909211).

11331033221 is an equidigital number, since it uses as much as digits as its factorization.

11331033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36909210.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 11331033221 its reverse (12233013311), we get a palindrome (23564046532).

The spelling of 11331033221 in words is "eleven billion, three hundred thirty-one million, thirty-three thousand, two hundred twenty-one".