33021220109 has 2 divisors, whose sum is σ = 33021220110. Its totient is φ = 33021220108.

The previous prime is 33021220081. The next prime is 33021220163. The reversal of 33021220109 is 90102212033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32934264484 + 86955625 = 181478^2 + 9325^2 .

It is a cyclic number.

It is not a de Polignac number, because 33021220109 - 2²⁰ = 33020171533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33021220009) 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, 16510610054 + 16510610055.

It is an arithmetic number, because the mean of its divisors is an integer number (16510610055).

Almost surely, 2^33021220109 is an apocalyptic number.

It is an amenable number.

33021220109 is a deficient number, since it is larger than the sum of its proper divisors (1).

33021220109 is an equidigital number, since it uses as much as digits as its factorization.

33021220109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 33021220109 in words is "thirty-three billion, twenty-one million, two hundred twenty thousand, one hundred nine".