212211220200121 has 2 divisors, whose sum is σ = 212211220200122. Its totient is φ = 212211220200120.

The previous prime is 212211220200079. The next prime is 212211220200149. The reversal of 212211220200121 is 121002022112212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194567347587600 + 17643872612521 = 13948740^2 + 4200461^2 .

It is a cyclic number.

It is not a de Polignac number, because 212211220200121 - 2¹¹ = 212211220198073 is a prime.

It is not a weakly prime, because it can be changed into another prime (212211220200821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105610100060 + 106105610100061.

It is an arithmetic number, because the mean of its divisors is an integer number (106105610100061).

Almost surely, 2^{212211220200121} is an apocalyptic number.

It is an amenable number.

212211220200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212211220200121 is an equidigital number, since it uses as much as digits as its factorization.

212211220200121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212211220200121 its reverse (121002022112212), we get a palindrome (333213242312333).

The spelling of 212211220200121 in words is "two hundred twelve trillion, two hundred eleven billion, two hundred twenty million, two hundred thousand, one hundred twenty-one".