2111121171 has 32 divisors (see below), whose sum is σ = 3309603840. Its totient is φ = 1327233600.

The previous prime is 2111121161. The next prime is 2111121197. The reversal of 2111121171 is 1711211112.

It is not a de Polignac number, because 2111121171 - 2⁵ = 2111121139 is a prime.

It is a super-2 number, since 2×2111121171² = 8913665197288822482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2111121101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20151 + ... + 68031.

It is an arithmetic number, because the mean of its divisors is an integer number (103425120).

Almost surely, 2^2111121171 is an apocalyptic number.

2111121171 is a deficient number, since it is larger than the sum of its proper divisors (1198482669).

2111121171 is a wasteful number, since it uses less digits than its factorization.

2111121171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47984 (or 47978 counting only the distinct ones).

The product of its digits is 28, while the sum is 18.

The square root of 2111121171 is about 45946.9386466607. The cubic root of 2111121171 is about 1282.8357480799.

Adding to 2111121171 its reverse (1711211112), we get a palindrome (3822332283).

The spelling of 2111121171 in words is "two billion, one hundred eleven million, one hundred twenty-one thousand, one hundred seventy-one".