33312221321 has 2 divisors, whose sum is σ = 33312221322. Its totient is φ = 33312221320.

The previous prime is 33312221291. The next prime is 33312221357. The reversal of 33312221321 is 12312221333.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22068588025 + 11243633296 = 148555^2 + 106036^2 .

It is a cyclic number.

It is not a de Polignac number, because 33312221321 - 2¹⁰ = 33312220297 is a prime.

It is a super-2 number, since 2×33312221321² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33312220321) 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, 16656110660 + 16656110661.

It is an arithmetic number, because the mean of its divisors is an integer number (16656110661).

Almost surely, 2^33312221321 is an apocalyptic number.

It is an amenable number.

33312221321 is a deficient number, since it is larger than the sum of its proper divisors (1).

33312221321 is an equidigital number, since it uses as much as digits as its factorization.

33312221321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 23.

Adding to 33312221321 its reverse (12312221333), we get a palindrome (45624442654).

The spelling of 33312221321 in words is "thirty-three billion, three hundred twelve million, two hundred twenty-one thousand, three hundred twenty-one".