11172222191 has 8 divisors (see below), whose sum is σ = 12032727840. Its totient is φ = 10311874272.

The previous prime is 11172222181. The next prime is 11172222223. The reversal of 11172222191 is 19122227111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11172222191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11172222181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136925 + ... + 202713.

It is an arithmetic number, because the mean of its divisors is an integer number (1504090980).

Almost surely, 2^11172222191 is an apocalyptic number.

11172222191 is a deficient number, since it is larger than the sum of its proper divisors (860505649).

11172222191 is a wasteful number, since it uses less digits than its factorization.

11172222191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78865.

The product of its digits is 1008, while the sum is 29.

The spelling of 11172222191 in words is "eleven billion, one hundred seventy-two million, two hundred twenty-two thousand, one hundred ninety-one".