11210209961 has 2 divisors, whose sum is σ = 11210209962. Its totient is φ = 11210209960.

The previous prime is 11210209957. The next prime is 11210209963. The reversal of 11210209961 is 16990201211.

11210209961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10845972736 + 364237225 = 104144^2 + 19085^2 .

It is an emirp because it is prime and its reverse (16990201211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11210209961 - 2² = 11210209957 is a prime.

Together with 11210209963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11210209963) 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, 5605104980 + 5605104981.

It is an arithmetic number, because the mean of its divisors is an integer number (5605104981).

Almost surely, 2^11210209961 is an apocalyptic number.

It is an amenable number.

11210209961 is a deficient number, since it is larger than the sum of its proper divisors (1).

11210209961 is an equidigital number, since it uses as much as digits as its factorization.

11210209961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 11210209961 in words is "eleven billion, two hundred ten million, two hundred nine thousand, nine hundred sixty-one".