2106871121 has 2 divisors, whose sum is σ = 2106871122. Its totient is φ = 2106871120.

The previous prime is 2106871103. The next prime is 2106871147. The reversal of 2106871121 is 1211786012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2061160000 + 45711121 = 45400^2 + 6761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2106871121 - 2³⁰ = 1033129297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2106871181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053435560 + 1053435561.

It is an arithmetic number, because the mean of its divisors is an integer number (1053435561).

Almost surely, 2^2106871121 is an apocalyptic number.

It is an amenable number.

2106871121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106871121 is an equidigital number, since it uses as much as digits as its factorization.

2106871121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 2106871121 is about 45900.6658012713. The cubic root of 2106871121 is about 1281.9743134189.

The spelling of 2106871121 in words is "two billion, one hundred six million, eight hundred seventy-one thousand, one hundred twenty-one".