211155220322201 has 12 divisors (see below), whose sum is σ = 225710072633700. Its totient is φ = 197297424969120.

The previous prime is 211155220322161. The next prime is 211155220322273. The reversal of 211155220322201 is 102223022551112.

211155220322201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 101758765878025 + 109396454444176 = 10087555^2 + 10459276^2 .

It is a de Polignac number, because none of the positive numbers 2^k-211155220322201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211155220322281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3788325146 + ... + 3788380883.

It is an arithmetic number, because the mean of its divisors is an integer number (18809172719475).

Almost surely, 2^{211155220322201} is an apocalyptic number.

It is an amenable number.

211155220322201 is a deficient number, since it is larger than the sum of its proper divisors (14554852311499).

211155220322201 is an equidigital number, since it uses as much as digits as its factorization.

211155220322201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7576706120 (or 7576706089 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 211155220322201 its reverse (102223022551112), we get a palindrome (313378242873313).

The spelling of 211155220322201 in words is "two hundred eleven trillion, one hundred fifty-five billion, two hundred twenty million, three hundred twenty-two thousand, two hundred one".