211121200011187 has 2 divisors, whose sum is σ = 211121200011188. Its totient is φ = 211121200011186.

The previous prime is 211121200011037. The next prime is 211121200011199. The reversal of 211121200011187 is 781110002121112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211121200011187 - 2³⁹ = 210571444197299 is a prime.

It is a super-2 number, since 2×211121200011187² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211121200014187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560600005593 + 105560600005594.

It is an arithmetic number, because the mean of its divisors is an integer number (105560600005594).

Almost surely, 2^{211121200011187} is an apocalyptic number.

211121200011187 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121200011187 is an equidigital number, since it uses as much as digits as its factorization.

211121200011187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 28.

Adding to 211121200011187 its reverse (781110002121112), we get a palindrome (992231202132299).

The spelling of 211121200011187 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred million, eleven thousand, one hundred eighty-seven".