33021231220013 has 4 divisors (see below), whose sum is σ = 33913696928700. Its totient is φ = 32128765511328.

The previous prime is 33021231219997. The next prime is 33021231220031. The reversal of 33021231220013 is 31002213212033.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28376055378724 + 4645175841289 = 5326918^2 + 2155267^2 .

It is a cyclic number.

It is not a de Polignac number, because 33021231220013 - 2⁴ = 33021231219997 is a prime.

It is a super-2 number, since 2×33021231220013² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33021231220093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446232854288 + ... + 446232854361.

It is an arithmetic number, because the mean of its divisors is an integer number (8478424232175).

Almost surely, 2^{33021231220013} is an apocalyptic number.

It is an amenable number.

33021231220013 is a deficient number, since it is larger than the sum of its proper divisors (892465708687).

33021231220013 is an equidigital number, since it uses as much as digits as its factorization.

33021231220013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892465708686.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 33021231220013 its reverse (31002213212033), we get a palindrome (64023444432046).

The spelling of 33021231220013 in words is "thirty-three trillion, twenty-one billion, two hundred thirty-one million, two hundred twenty thousand, thirteen".