222112202100121 has 2 divisors, whose sum is σ = 222112202100122. Its totient is φ = 222112202100120.

The previous prime is 222112202100073. The next prime is 222112202100157. The reversal of 222112202100121 is 121001202211222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222076607995225 + 35594104896 = 14902235^2 + 188664^2 .

It is a cyclic number.

It is not a de Polignac number, because 222112202100121 - 2³¹ = 222110054616473 is a prime.

It is not a weakly prime, because it can be changed into another prime (222112202109121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111056101050060 + 111056101050061.

It is an arithmetic number, because the mean of its divisors is an integer number (111056101050061).

Almost surely, 2^{222112202100121} is an apocalyptic number.

It is an amenable number.

222112202100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222112202100121 is an equidigital number, since it uses as much as digits as its factorization.

222112202100121 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 222112202100121 its reverse (121001202211222), we get a palindrome (343113404311343).

The spelling of 222112202100121 in words is "two hundred twenty-two trillion, one hundred twelve billion, two hundred two million, one hundred thousand, one hundred twenty-one".