33223201021 has 2 divisors, whose sum is σ = 33223201022. Its totient is φ = 33223201020.

The previous prime is 33223201007. The next prime is 33223201117. The reversal of 33223201021 is 12010232233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20076056100 + 13147144921 = 141690^2 + 114661^2 .

It is a cyclic number.

It is not a de Polignac number, because 33223201021 - 2¹⁷ = 33223069949 is a prime.

It is a super-2 number, since 2×33223201021² (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 33223201021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33223207021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16611600510 + 16611600511.

It is an arithmetic number, because the mean of its divisors is an integer number (16611600511).

Almost surely, 2^33223201021 is an apocalyptic number.

It is an amenable number.

33223201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33223201021 is an equidigital number, since it uses as much as digits as its factorization.

33223201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 33223201021 its reverse (12010232233), we get a palindrome (45233433254).

The spelling of 33223201021 in words is "thirty-three billion, two hundred twenty-three million, two hundred one thousand, twenty-one".