33221233021 has 2 divisors, whose sum is σ = 33221233022. Its totient is φ = 33221233020.

The previous prime is 33221232983. The next prime is 33221233039. The reversal of 33221233021 is 12033212233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33219072121 + 2160900 = 182261^2 + 1470^2 .

It is a cyclic number.

It is not a de Polignac number, because 33221233021 - 2¹⁹ = 33220708733 is a prime.

It is a super-2 number, since 2×33221233021² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33221232983 and 33221233001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33221233121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16610616510 + 16610616511.

It is an arithmetic number, because the mean of its divisors is an integer number (16610616511).

Almost surely, 2^33221233021 is an apocalyptic number.

It is an amenable number.

33221233021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33221233021 is an equidigital number, since it uses as much as digits as its factorization.

33221233021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 33221233021 its reverse (12033212233), we get a palindrome (45254445254).

The spelling of 33221233021 in words is "thirty-three billion, two hundred twenty-one million, two hundred thirty-three thousand, twenty-one".