33001021 has 4 divisors (see below), whose sum is σ = 34435872. Its totient is φ = 31566172.

The previous prime is 33001009. The next prime is 33001027. The reversal of 33001021 is 12010033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33001021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33000989 and 33001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33001027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 717391 + ... + 717436.

It is an arithmetic number, because the mean of its divisors is an integer number (8608968).

Almost surely, 2^33001021 is an apocalyptic number.

It is an amenable number.

33001021 is a deficient number, since it is larger than the sum of its proper divisors (1434851).

33001021 is a wasteful number, since it uses less digits than its factorization.

33001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434850.

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

The square root of 33001021 is about 5744.6515124940. The cubic root of 33001021 is about 320.7567409377.

Adding to 33001021 its reverse (12010033), we get a palindrome (45011054).

The spelling of 33001021 in words is "thirty-three million, one thousand, twenty-one".