11211212121163 has 2 divisors, whose sum is σ = 11211212121164. Its totient is φ = 11211212121162.

The previous prime is 11211212121097. The next prime is 11211212121211. The reversal of 11211212121163 is 36112121211211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11211212121163 - 2⁹ = 11211212120651 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211212121763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605606060581 + 5605606060582.

It is an arithmetic number, because the mean of its divisors is an integer number (5605606060582).

Almost surely, 2^{11211212121163} is an apocalyptic number.

11211212121163 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211212121163 is an equidigital number, since it uses as much as digits as its factorization.

11211212121163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 25.

Adding to 11211212121163 its reverse (36112121211211), we get a palindrome (47323333332374).

The spelling of 11211212121163 in words is "eleven trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred sixty-three".