111145706871 has 4 divisors (see below), whose sum is σ = 148194275832. Its totient is φ = 74097137912.

The previous prime is 111145706827. The next prime is 111145706879. The reversal of 111145706871 is 178607541111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111145706871 - 2²¹ = 111143609719 is a prime.

It is a super-2 number, since 2×111145706871² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111145706879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18524284476 + ... + 18524284481.

It is an arithmetic number, because the mean of its divisors is an integer number (37048568958).

Almost surely, 2^111145706871 is an apocalyptic number.

111145706871 is a deficient number, since it is larger than the sum of its proper divisors (37048568961).

111145706871 is an equidigital number, since it uses as much as digits as its factorization.

111145706871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37048568960.

The product of its (nonzero) digits is 47040, while the sum is 42.

The spelling of 111145706871 in words is "one hundred eleven billion, one hundred forty-five million, seven hundred six thousand, eight hundred seventy-one".