33110421221 has 2 divisors, whose sum is σ = 33110421222. Its totient is φ = 33110421220.

The previous prime is 33110421199. The next prime is 33110421233. The reversal of 33110421221 is 12212401133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26999090596 + 6111330625 = 164314^2 + 78175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33110421221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33110421193 and 33110421202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33110426221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16555210610 + 16555210611.

It is an arithmetic number, because the mean of its divisors is an integer number (16555210611).

Almost surely, 2^33110421221 is an apocalyptic number.

It is an amenable number.

33110421221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33110421221 is an equidigital number, since it uses as much as digits as its factorization.

33110421221 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 20.

Adding to 33110421221 its reverse (12212401133), we get a palindrome (45322822354).

The spelling of 33110421221 in words is "thirty-three billion, one hundred ten million, four hundred twenty-one thousand, two hundred twenty-one".