211102121 has 2 divisors, whose sum is σ = 211102122. Its totient is φ = 211102120.

The previous prime is 211102097. The next prime is 211102123. The reversal of 211102121 is 121201112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157226521 + 53875600 = 12539^2 + 7340^2 .

It is a cyclic number.

It is not a de Polignac number, because 211102121 - 2¹⁰ = 211101097 is a prime.

Together with 211102123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211102123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105551060 + 105551061.

It is an arithmetic number, because the mean of its divisors is an integer number (105551061).

Almost surely, 2^211102121 is an apocalyptic number.

It is an amenable number.

211102121 is a deficient number, since it is larger than the sum of its proper divisors (1).

211102121 is an equidigital number, since it uses as much as digits as its factorization.

211102121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 211102121 is about 14529.3537709012. The cubic root of 211102121 is about 595.4302102498.

Adding to 211102121 its reverse (121201112), we get a palindrome (332303233).

The spelling of 211102121 in words is "two hundred eleven million, one hundred two thousand, one hundred twenty-one".