33002021 has 4 divisors (see below), whose sum is σ = 35540652. Its totient is φ = 30463392.

The previous prime is 33001979. The next prime is 33002041. The reversal of 33002021 is 12020033.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12020033 = 31 ⋅387743.

It can be written as a sum of positive squares in 2 ways, for example, as 1473796 + 31528225 = 1214^2 + 5615^2 .

It is a cyclic number.

It is not a de Polignac number, because 33002021 - 2⁶ = 33001957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33001993 and 33002011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33002041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1269296 + ... + 1269321.

It is an arithmetic number, because the mean of its divisors is an integer number (8885163).

Almost surely, 2^33002021 is an apocalyptic number.

It is an amenable number.

33002021 is a deficient number, since it is larger than the sum of its proper divisors (2538631).

33002021 is a wasteful number, since it uses less digits than its factorization.

33002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538630.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 33002021 is about 5744.7385493162. The cubic root of 33002021 is about 320.7599807719.

Adding to 33002021 its reverse (12020033), we get a palindrome (45022054).

The spelling of 33002021 in words is "thirty-three million, two thousand, twenty-one".