33010021 has 8 divisors (see below), whose sum is σ = 36175104. Its totient is φ = 29872320.

The previous prime is 33010007. The next prime is 33010051. The reversal of 33010021 is 12001033.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33010021 - 2⁵ = 33009989 is a prime.

It is a super-2 number, since 2×33010021² = 2179322972840882, 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 (33010051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4276 + ... + 9181.

It is an arithmetic number, because the mean of its divisors is an integer number (4521888).

Almost surely, 2^33010021 is an apocalyptic number.

It is an amenable number.

33010021 is a deficient number, since it is larger than the sum of its proper divisors (3165083).

33010021 is a wasteful number, since it uses less digits than its factorization.

33010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13691.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 33010021 is about 5745.4347964275. The cubic root of 33010021 is about 320.7858970890.

Adding to 33010021 its reverse (12001033), we get a palindrome (45011054).

The spelling of 33010021 in words is "thirty-three million, ten thousand, twenty-one".