2110211111161 has 2 divisors, whose sum is σ = 2110211111162. Its totient is φ = 2110211111160.

The previous prime is 2110211111159. The next prime is 2110211111221. The reversal of 2110211111161 is 1611111120112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1807250035600 + 302961075561 = 1344340^2 + 550419^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110211111161 - 2¹ = 2110211111159 is a prime.

Together with 2110211111159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2110211111461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055105555580 + 1055105555581.

It is an arithmetic number, because the mean of its divisors is an integer number (1055105555581).

Almost surely, 2^{2110211111161} is an apocalyptic number.

It is an amenable number.

2110211111161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2110211111161 is an equidigital number, since it uses as much as digits as its factorization.

2110211111161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 19.

Adding to 2110211111161 its reverse (1611111120112), we get a palindrome (3721322231273).

The spelling of 2110211111161 in words is "two trillion, one hundred ten billion, two hundred eleven million, one hundred eleven thousand, one hundred sixty-one".