11333021221 has 2 divisors, whose sum is σ = 11333021222. Its totient is φ = 11333021220.

The previous prime is 11333021201. The next prime is 11333021233. The reversal of 11333021221 is 12212033311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8895130596 + 2437890625 = 94314^2 + 49375^2 .

It is a cyclic number.

It is not a de Polignac number, because 11333021221 - 2²⁷ = 11198803493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11333021201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5666510610 + 5666510611.

It is an arithmetic number, because the mean of its divisors is an integer number (5666510611).

Almost surely, 2^11333021221 is an apocalyptic number.

It is an amenable number.

11333021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11333021221 is an equidigital number, since it uses as much as digits as its factorization.

11333021221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 11333021221 its reverse (12212033311), we get a palindrome (23545054532).

The spelling of 11333021221 in words is "eleven billion, three hundred thirty-three million, twenty-one thousand, two hundred twenty-one".