222121210101211 has 2 divisors, whose sum is σ = 222121210101212. Its totient is φ = 222121210101210.

The previous prime is 222121210101187. The next prime is 222121210101223. The reversal of 222121210101211 is 112101012121222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222121210101211 - 2³⁵ = 222086850362843 is a prime.

It is not a weakly prime, because it can be changed into another prime (222121210101811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060605050605 + 111060605050606.

It is an arithmetic number, because the mean of its divisors is an integer number (111060605050606).

Almost surely, 2^{222121210101211} is an apocalyptic number.

222121210101211 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121210101211 is an equidigital number, since it uses as much as digits as its factorization.

222121210101211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 222121210101211 its reverse (112101012121222), we get a palindrome (334222222222433).

The spelling of 222121210101211 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred ten million, one hundred one thousand, two hundred eleven".