33003042221 has 4 divisors (see below), whose sum is σ = 33003406944. Its totient is φ = 33002677500.

The previous prime is 33003042197. The next prime is 33003042239. The reversal of 33003042221 is 12224030033.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 33003042221 - 2¹⁸ = 33002780077 is a prime.

It is a super-2 number, since 2×33003042221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33003042193 and 33003042202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33003042271) 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, 67346 + ... + 265596.

It is an arithmetic number, because the mean of its divisors is an integer number (8250851736).

Almost surely, 2^33003042221 is an apocalyptic number.

It is an amenable number.

33003042221 is a deficient number, since it is larger than the sum of its proper divisors (364723).

33003042221 is a wasteful number, since it uses less digits than its factorization.

33003042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364722.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 33003042221 its reverse (12224030033), we get a palindrome (45227072254).

The spelling of 33003042221 in words is "thirty-three billion, three million, forty-two thousand, two hundred twenty-one".