222112220200121 has 2 divisors, whose sum is σ = 222112220200122. Its totient is φ = 222112220200120.

The previous prime is 222112220200111. The next prime is 222112220200207. The reversal of 222112220200121 is 121002022211222.

222112220200121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213746271364096 + 8365948836025 = 14620064^2 + 2892395^2 .

It is a cyclic number.

It is not a de Polignac number, because 222112220200121 - 2¹⁰ = 222112220199097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222112220200093 and 222112220200102.

It is not a weakly prime, because it can be changed into another prime (222112220200111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111056110100060 + 111056110100061.

It is an arithmetic number, because the mean of its divisors is an integer number (111056110100061).

Almost surely, 2^{222112220200121} is an apocalyptic number.

It is an amenable number.

222112220200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222112220200121 is an equidigital number, since it uses as much as digits as its factorization.

222112220200121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222112220200121 its reverse (121002022211222), we get a palindrome (343114242411343).

The spelling of 222112220200121 in words is "two hundred twenty-two trillion, one hundred twelve billion, two hundred twenty million, two hundred thousand, one hundred twenty-one".