33033020021 has 4 divisors (see below), whose sum is σ = 34098601344. Its totient is φ = 31967438700.

The previous prime is 33033020017. The next prime is 33033020023. The reversal of 33033020021 is 12002033033.

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 not a de Polignac number, because 33033020021 - 2² = 33033020017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33033020023) 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, 532790615 + ... + 532790676.

It is an arithmetic number, because the mean of its divisors is an integer number (8524650336).

Almost surely, 2^33033020021 is an apocalyptic number.

33033020021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

33033020021 is a deficient number, since it is larger than the sum of its proper divisors (1065581323).

33033020021 is a wasteful number, since it uses less digits than its factorization.

33033020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065581322.

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 33033020021 its reverse (12002033033), we get a palindrome (45035053054).

The spelling of 33033020021 in words is "thirty-three billion, thirty-three million, twenty thousand, twenty-one".