33143221021 has 8 divisors (see below), whose sum is σ = 33386451840. Its totient is φ = 32900058912.

The previous prime is 33143220917. The next prime is 33143221037. The reversal of 33143221021 is 12012234133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33143221021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33143220983 and 33143221001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33143221051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1342041 + ... + 1366513.

It is an arithmetic number, because the mean of its divisors is an integer number (4173306480).

Almost surely, 2^33143221021 is an apocalyptic number.

It is an amenable number.

33143221021 is a deficient number, since it is larger than the sum of its proper divisors (243230819).

33143221021 is a wasteful number, since it uses less digits than its factorization.

33143221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34355.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 33143221021 its reverse (12012234133), we get a palindrome (45155455154).

The spelling of 33143221021 in words is "thirty-three billion, one hundred forty-three million, two hundred twenty-one thousand, twenty-one".