11331320221 has 8 divisors (see below), whose sum is σ = 12284861400. Its totient is φ = 10389479232.

The previous prime is 11331320219. The next prime is 11331320293. The reversal of 11331320221 is 12202313311.

It can be written as a sum of positive squares in 4 ways, for example, as 124768900 + 11206551321 = 11170^2 + 105861^2 .

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 11331320221 - 2¹ = 11331320219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331320321) 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, 2923030 + ... + 2926903.

It is an arithmetic number, because the mean of its divisors is an integer number (1535607675).

Almost surely, 2^11331320221 is an apocalyptic number.

It is an amenable number.

11331320221 is a deficient number, since it is larger than the sum of its proper divisors (953541179).

11331320221 is a wasteful number, since it uses less digits than its factorization.

11331320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5850095.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11331320221 its reverse (12202313311), we get a palindrome (23533633532).

The spelling of 11331320221 in words is "eleven billion, three hundred thirty-one million, three hundred twenty thousand, two hundred twenty-one".