33212243004221 has 2 divisors, whose sum is σ = 33212243004222. Its totient is φ = 33212243004220.

The previous prime is 33212243004173. The next prime is 33212243004271. The reversal of 33212243004221 is 12240034221233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17006674927225 + 16205568076996 = 4123915^2 + 4025614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33212243004221 is a prime.

It is a super-2 number, since 2×33212243004221² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33212243004271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16606121502110 + 16606121502111.

It is an arithmetic number, because the mean of its divisors is an integer number (16606121502111).

Almost surely, 2^{33212243004221} is an apocalyptic number.

It is an amenable number.

33212243004221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33212243004221 is an equidigital number, since it uses as much as digits as its factorization.

33212243004221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 33212243004221 its reverse (12240034221233), we get a palindrome (45452277225454).

The spelling of 33212243004221 in words is "thirty-three trillion, two hundred twelve billion, two hundred forty-three million, four thousand, two hundred twenty-one".