33112220221 has 2 divisors, whose sum is σ = 33112220222. Its totient is φ = 33112220220.

The previous prime is 33112220209. The next prime is 33112220231. The reversal of 33112220221 is 12202221133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16689797721 + 16422422500 = 129189^2 + 128150^2 .

It is a cyclic number.

It is not a de Polignac number, because 33112220221 - 2⁷ = 33112220093 is a prime.

It is a super-4 number, since 4×33112220221⁴ (a number of 43 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33112220231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16556110110 + 16556110111.

It is an arithmetic number, because the mean of its divisors is an integer number (16556110111).

Almost surely, 2^33112220221 is an apocalyptic number.

It is an amenable number.

33112220221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33112220221 is an equidigital number, since it uses as much as digits as its factorization.

33112220221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 33112220221 its reverse (12202221133), we get a palindrome (45314441354).

The spelling of 33112220221 in words is "thirty-three billion, one hundred twelve million, two hundred twenty thousand, two hundred twenty-one".