33300021 has 12 divisors (see below), whose sum is σ = 46416608. Its totient is φ = 21233784.

The previous prime is 33300019. The next prime is 33300023. The reversal of 33300021 is 12000333.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (33300019) and next prime (33300023).

It is not a de Polignac number, because 33300021 - 2¹ = 33300019 is a prime.

It is a super-2 number, since 2×33300021² = 2217782797200882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33300023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8905 + ... + 12078.

Almost surely, 2^33300021 is an apocalyptic number.

It is an amenable number.

33300021 is a deficient number, since it is larger than the sum of its proper divisors (13116587).

33300021 is a wasteful number, since it uses less digits than its factorization.

33300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21032 (or 21009 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 33300021 is about 5770.6170380645. The cubic root of 33300021 is about 321.7225501208.

Adding to 33300021 its reverse (12000333), we get a palindrome (45300354).

The spelling of 33300021 in words is "thirty-three million, three hundred thousand, twenty-one".