212012222222221 has 2 divisors, whose sum is σ = 212012222222222. Its totient is φ = 212012222222220.

The previous prime is 212012222222179. The next prime is 212012222222263. The reversal of 212012222222221 is 122222222210212.

It is a balanced prime because it is at equal distance from previous prime (212012222222179) and next prime (212012222222263).

It can be written as a sum of positive squares in only one way, i.e., 166324612956100 + 45687609266121 = 12896690^2 + 6759261^2 .

It is a cyclic number.

It is not a de Polignac number, because 212012222222221 - 2¹⁹ = 212012221697933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212012222222821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106006111111110 + 106006111111111.

It is an arithmetic number, because the mean of its divisors is an integer number (106006111111111).

Almost surely, 2^{212012222222221} is an apocalyptic number.

It is an amenable number.

212012222222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

212012222222221 is an equidigital number, since it uses as much as digits as its factorization.

212012222222221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 212012222222221 its reverse (122222222210212), we get a palindrome (334234444432433).

The spelling of 212012222222221 in words is "two hundred twelve trillion, twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".