2212213061221 has 2 divisors, whose sum is σ = 2212213061222. Its totient is φ = 2212213061220.

The previous prime is 2212213061213. The next prime is 2212213061237. The reversal of 2212213061221 is 1221603122122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1465276356196 + 746936705025 = 1210486^2 + 864255^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212213061221 - 2³ = 2212213061213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2212213061021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106106530610 + 1106106530611.

It is an arithmetic number, because the mean of its divisors is an integer number (1106106530611).

Almost surely, 2^{2212213061221} is an apocalyptic number.

It is an amenable number.

2212213061221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212213061221 is an equidigital number, since it uses as much as digits as its factorization.

2212213061221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 2212213061221 its reverse (1221603122122), we get a palindrome (3433816183343).

The spelling of 2212213061221 in words is "two trillion, two hundred twelve billion, two hundred thirteen million, sixty-one thousand, two hundred twenty-one".