211555250113 has 2 divisors, whose sum is σ = 211555250114. Its totient is φ = 211555250112.

The previous prime is 211555250107. The next prime is 211555250141. The reversal of 211555250113 is 311052555112.

211555250113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204247051969 + 7308198144 = 451937^2 + 85488^2 .

It is a cyclic number.

It is not a de Polignac number, because 211555250113 - 2³⁷ = 74116296641 is a prime.

It is not a weakly prime, because it can be changed into another prime (211555250173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105777625056 + 105777625057.

It is an arithmetic number, because the mean of its divisors is an integer number (105777625057).

Almost surely, 2^211555250113 is an apocalyptic number.

It is an amenable number.

211555250113 is a deficient number, since it is larger than the sum of its proper divisors (1).

211555250113 is an equidigital number, since it uses as much as digits as its factorization.

211555250113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7500, while the sum is 31.

The spelling of 211555250113 in words is "two hundred eleven billion, five hundred fifty-five million, two hundred fifty thousand, one hundred thirteen".