33121023320 has 128 divisors (see below), whose sum is σ = 92972966400. Its totient is φ = 10316544000.

The previous prime is 33121023283. The next prime is 33121023323. The reversal of 33121023320 is 2332012133.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 33121023292 and 33121023301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33121023323) 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 31 ways as a sum of consecutive naturals, for example, 6554795 + ... + 6559845.

It is an arithmetic number, because the mean of its divisors is an integer number (726351300).

Almost surely, 2^33121023320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33121023320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46486483200).

33121023320 is an abundant number, since it is smaller than the sum of its proper divisors (59851943080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33121023320 is a wasteful number, since it uses less digits than its factorization.

33121023320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7209 (or 7205 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 33121023320 its reverse (2332012133), we get a palindrome (35453035453).

The spelling of 33121023320 in words is "thirty-three billion, one hundred twenty-one million, twenty-three thousand, three hundred twenty".