11333133221 has 2 divisors, whose sum is σ = 11333133222. Its totient is φ = 11333133220.

The previous prime is 11333133193. The next prime is 11333133241. The reversal of 11333133221 is 12233133311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10862850625 + 470282596 = 104225^2 + 21686^2 .

It is a cyclic number.

It is not a de Polignac number, because 11333133221 - 2³⁰ = 10259391397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11333133241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5666566610 + 5666566611.

It is an arithmetic number, because the mean of its divisors is an integer number (5666566611).

Almost surely, 2^11333133221 is an apocalyptic number.

It is an amenable number.

11333133221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11333133221 is an equidigital number, since it uses as much as digits as its factorization.

11333133221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 23.

Adding to 11333133221 its reverse (12233133311), we get a palindrome (23566266532).

The spelling of 11333133221 in words is "eleven billion, three hundred thirty-three million, one hundred thirty-three thousand, two hundred twenty-one".