33313320021 has 16 divisors (see below), whose sum is σ = 45667296000. Its totient is φ = 21590455488.

The previous prime is 33313319999. The next prime is 33313320049. The reversal of 33313320021 is 12002331333.

It is not a de Polignac number, because 33313320021 - 2¹⁴ = 33313303637 is a prime.

It is a super-2 number, since 2×33313320021² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33313320021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33313320121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771826 + ... + 813843.

It is an arithmetic number, because the mean of its divisors is an integer number (2854206000).

Almost surely, 2^33313320021 is an apocalyptic number.

It is an amenable number.

33313320021 is a deficient number, since it is larger than the sum of its proper divisors (12353975979).

33313320021 is a wasteful number, since it uses less digits than its factorization.

33313320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585868.

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

Adding to 33313320021 its reverse (12002331333), we get a palindrome (45315651354).

The spelling of 33313320021 in words is "thirty-three billion, three hundred thirteen million, three hundred twenty thousand, twenty-one".