871115121 has 16 divisors (see below), whose sum is σ = 1295572800. Its totient is φ = 578479104.

The previous prime is 871115057. The next prime is 871115123. The reversal of 871115121 is 121511178.

It is not a de Polignac number, because 871115121 - 2⁶ = 871115057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (871115123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55831 + ... + 69708.

It is an arithmetic number, because the mean of its divisors is an integer number (80973300).

Almost surely, 2^871115121 is an apocalyptic number.

It is an amenable number.

871115121 is a deficient number, since it is larger than the sum of its proper divisors (424457679).

871115121 is a wasteful number, since it uses less digits than its factorization.

871115121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125805 (or 125799 counting only the distinct ones).

The product of its digits is 560, while the sum is 27.

The square root of 871115121 is about 29514.6594254448. The cubic root of 871115121 is about 955.0479663051.

Adding to 871115121 its reverse (121511178), we get a palindrome (992626299).

It can be divided in two parts, 8711 and 15121, that added together give a palindrome (23832).

The spelling of 871115121 in words is "eight hundred seventy-one million, one hundred fifteen thousand, one hundred twenty-one".