211121020121113 has 2 divisors, whose sum is σ = 211121020121114. Its totient is φ = 211121020121112.

The previous prime is 211121020121041. The next prime is 211121020121147. The reversal of 211121020121113 is 311121020121112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145459688484889 + 65661331636224 = 12060667^2 + 8103168^2 .

It is a cyclic number.

It is not a de Polignac number, because 211121020121113 - 2¹³ = 211121020112921 is a prime.

It is not a weakly prime, because it can be changed into another prime (211121020128113) 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, 105560510060556 + 105560510060557.

It is an arithmetic number, because the mean of its divisors is an integer number (105560510060557).

Almost surely, 2^{211121020121113} is an apocalyptic number.

It is an amenable number.

211121020121113 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121020121113 is an equidigital number, since it uses as much as digits as its factorization.

211121020121113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 211121020121113 its reverse (311121020121112), we get a palindrome (522242040242225).

Subtracting 211121020121113 from its reverse (311121020121112), we obtain a palindrome (99999999999999).

The spelling of 211121020121113 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty million, one hundred twenty-one thousand, one hundred thirteen".