33123330021 has 32 divisors (see below), whose sum is σ = 46782720000. Its totient is φ = 20788161408.

The previous prime is 33123330017. The next prime is 33123330029. The reversal of 33123330021 is 12003332133.

It is not a de Polignac number, because 33123330021 - 2² = 33123330017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33123330021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33123330029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7122505 + ... + 7127153.

It is an arithmetic number, because the mean of its divisors is an integer number (1461960000).

Almost surely, 2^33123330021 is an apocalyptic number.

It is an amenable number.

33123330021 is a deficient number, since it is larger than the sum of its proper divisors (13659389979).

33123330021 is a wasteful number, since it uses less digits than its factorization.

33123330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5433.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 33123330021 its reverse (12003332133), we get a palindrome (45126662154).

It can be divided in two parts, 3312 and 3330021, that added together give a palindrome (3333333).

The spelling of 33123330021 in words is "thirty-three billion, one hundred twenty-three million, three hundred thirty thousand, twenty-one".