33033320021 has 16 divisors (see below), whose sum is σ = 36637776000. Its totient is φ = 29585383488.

The previous prime is 33033319999. The next prime is 33033320137. The reversal of 33033320021 is 12002333033.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33033320021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 33033319975 and 33033320002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33033320821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77030 + ... + 268328.

It is an arithmetic number, because the mean of its divisors is an integer number (2289861000).

Almost surely, 2^33033320021 is an apocalyptic number.

It is an amenable number.

33033320021 is a deficient number, since it is larger than the sum of its proper divisors (3604455979).

33033320021 is a wasteful number, since it uses less digits than its factorization.

33033320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191708.

The product of its (nonzero) digits is 972, while the sum is 20.

Adding to 33033320021 its reverse (12002333033), we get a palindrome (45035653054).

The spelling of 33033320021 in words is "thirty-three billion, thirty-three million, three hundred twenty thousand, twenty-one".