211611000241 has 2 divisors, whose sum is σ = 211611000242. Its totient is φ = 211611000240.

The previous prime is 211611000239. The next prime is 211611000259. The reversal of 211611000241 is 142000116112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210493769616 + 1117230625 = 458796^2 + 33425^2 .

It is a cyclic number.

It is not a de Polignac number, because 211611000241 - 2¹ = 211611000239 is a prime.

Together with 211611000239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (211611000221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105805500120 + 105805500121.

It is an arithmetic number, because the mean of its divisors is an integer number (105805500121).

Almost surely, 2^211611000241 is an apocalyptic number.

It is an amenable number.

211611000241 is a deficient number, since it is larger than the sum of its proper divisors (1).

211611000241 is an equidigital number, since it uses as much as digits as its factorization.

211611000241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 211611000241 its reverse (142000116112), we get a palindrome (353611116353).

The spelling of 211611000241 in words is "two hundred eleven billion, six hundred eleven million, two hundred forty-one", and thus it is an aban number.