3222121122221 has 2 divisors, whose sum is σ = 3222121122222. Its totient is φ = 3222121122220.

The previous prime is 3222121122197. The next prime is 3222121122239. The reversal of 3222121122221 is 1222211212223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3120914425321 + 101206696900 = 1766611^2 + 318130^2 .

It is a cyclic number.

It is not a de Polignac number, because 3222121122221 - 2¹⁴ = 3222121105837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3222121122281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1611060561110 + 1611060561111.

It is an arithmetic number, because the mean of its divisors is an integer number (1611060561111).

Almost surely, 2^{3222121122221} is an apocalyptic number.

It is an amenable number.

3222121122221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3222121122221 is an equidigital number, since it uses as much as digits as its factorization.

3222121122221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

Adding to 3222121122221 its reverse (1222211212223), we get a palindrome (4444332334444).

The spelling of 3222121122221 in words is "three trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty-one".