33053521021221 has 4 divisors (see below), whose sum is σ = 44071361361632. Its totient is φ = 22035680680812.

The previous prime is 33053521021207. The next prime is 33053521021243. The reversal of 33053521021221 is 12212012535033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 33053521021221 - 2¹⁷ = 33053520890149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33053521028221) 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 3 ways as a sum of consecutive naturals, for example, 5508920170201 + ... + 5508920170206.

It is an arithmetic number, because the mean of its divisors is an integer number (11017840340408).

Almost surely, 2^{33053521021221} is an apocalyptic number.

It is an amenable number.

33053521021221 is a deficient number, since it is larger than the sum of its proper divisors (11017840340411).

33053521021221 is a wasteful number, since it uses less digits than its factorization.

33053521021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11017840340410.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 33053521021221 its reverse (12212012535033), we get a palindrome (45265533556254).

The spelling of 33053521021221 in words is "thirty-three trillion, fifty-three billion, five hundred twenty-one million, twenty-one thousand, two hundred twenty-one".