33043244021 has 4 divisors (see below), whose sum is σ = 33849176844. Its totient is φ = 32237311200.

The previous prime is 33043243973. The next prime is 33043244027. The reversal of 33043244021 is 12044234033.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18813139921 + 14230104100 = 137161^2 + 119290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33043244021 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 (33043244027) 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, 402966350 + ... + 402966431.

It is an arithmetic number, because the mean of its divisors is an integer number (8462294211).

Almost surely, 2^33043244021 is an apocalyptic number.

It is an amenable number.

33043244021 is a deficient number, since it is larger than the sum of its proper divisors (805932823).

33043244021 is an equidigital number, since it uses as much as digits as its factorization.

33043244021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805932822.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 33043244021 its reverse (12044234033), we get a palindrome (45087478054).

The spelling of 33043244021 in words is "thirty-three billion, forty-three million, two hundred forty-four thousand, twenty-one".