33285329921 has 2 divisors, whose sum is σ = 33285329922. Its totient is φ = 33285329920.

The previous prime is 33285329899. The next prime is 33285330019. The reversal of 33285329921 is 12992358233.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30507512896 + 2777817025 = 174664^2 + 52705^2 .

It is an emirp because it is prime and its reverse (12992358233) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33285329921 is a prime.

It is a super-2 number, since 2×33285329921² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33285329321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16642664960 + 16642664961.

It is an arithmetic number, because the mean of its divisors is an integer number (16642664961).

Almost surely, 2^33285329921 is an apocalyptic number.

It is an amenable number.

33285329921 is a deficient number, since it is larger than the sum of its proper divisors (1).

33285329921 is an equidigital number, since it uses as much as digits as its factorization.

33285329921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 47.

The spelling of 33285329921 in words is "thirty-three billion, two hundred eighty-five million, three hundred twenty-nine thousand, nine hundred twenty-one".