33124021 has 4 divisors (see below), whose sum is σ = 37856032. Its totient is φ = 28392012.

The previous prime is 33124009. The next prime is 33124033. The reversal of 33124021 is 12042133.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12042133 = 23 ⋅523571.

It is an interprime number because it is at equal distance from previous prime (33124009) and next prime (33124033).

It is a cyclic number.

It is not a de Polignac number, because 33124021 - 2⁹ = 33123509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33123986 and 33124004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33124001) 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, 2365995 + ... + 2366008.

It is an arithmetic number, because the mean of its divisors is an integer number (9464008).

Almost surely, 2^33124021 is an apocalyptic number.

It is an amenable number.

33124021 is a deficient number, since it is larger than the sum of its proper divisors (4732011).

33124021 is an equidigital number, since it uses as much as digits as its factorization.

33124021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732010.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 33124021 is about 5755.3471658971. The cubic root of 33124021 is about 321.1547504865.

Adding to 33124021 its reverse (12042133), we get a palindrome (45166154).

The spelling of 33124021 in words is "thirty-three million, one hundred twenty-four thousand, twenty-one".