2111071165 has 24 divisors (see below), whose sum is σ = 2953353312. Its totient is φ = 1444413600.

The previous prime is 2111071163. The next prime is 2111071199. The reversal of 2111071165 is 5611701112.

It is not a de Polignac number, because 2111071165 - 2¹ = 2111071163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111071163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105190 + ... + 123640.

It is an arithmetic number, because the mean of its divisors is an integer number (123056388).

Almost surely, 2^2111071165 is an apocalyptic number.

It is an amenable number.

2111071165 is a deficient number, since it is larger than the sum of its proper divisors (842282147).

2111071165 is a wasteful number, since it uses less digits than its factorization.

2111071165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18937 (or 18930 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 25.

The square root of 2111071165 is about 45946.3944722543. The cubic root of 2111071165 is about 1282.8256191823.

Adding to 2111071165 its reverse (5611701112), we get a palindrome (7722772277).

The spelling of 2111071165 in words is "two billion, one hundred eleven million, seventy-one thousand, one hundred sixty-five".