2110858166861 has 4 divisors (see below), whose sum is σ = 2178950365824. Its totient is φ = 2042765967900.

The previous prime is 2110858166843. The next prime is 2110858166867. The reversal of 2110858166861 is 1686618580112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2110858166861 - 2³⁰ = 2109784425037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2110858166867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34046099435 + ... + 34046099496.

It is an arithmetic number, because the mean of its divisors is an integer number (544737591456).

Almost surely, 2^{2110858166861} is an apocalyptic number.

It is an amenable number.

2110858166861 is a deficient number, since it is larger than the sum of its proper divisors (68092198963).

2110858166861 is an equidigital number, since it uses as much as digits as its factorization.

2110858166861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68092198962.

The product of its (nonzero) digits is 1105920, while the sum is 53.

The spelling of 2110858166861 in words is "two trillion, one hundred ten billion, eight hundred fifty-eight million, one hundred sixty-six thousand, eight hundred sixty-one".