11115172071 has 12 divisors (see below), whose sum is σ = 16097173248. Its totient is φ = 7390764864.

The previous prime is 11115172043. The next prime is 11115172087. The reversal of 11115172071 is 17027151111.

It is a happy number.

It is not a de Polignac number, because 11115172071 - 2¹¹ = 11115170023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11115172571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1608850 + ... + 1615743.

It is an arithmetic number, because the mean of its divisors is an integer number (1341431104).

Almost surely, 2^11115172071 is an apocalyptic number.

11115172071 is a deficient number, since it is larger than the sum of its proper divisors (4982001177).

11115172071 is a wasteful number, since it uses less digits than its factorization.

11115172071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224982 (or 3224979 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 27.

The spelling of 11115172071 in words is "eleven billion, one hundred fifteen million, one hundred seventy-two thousand, seventy-one".