12191384722 has 16 divisors (see below), whose sum is σ = 20247295392. Its totient is φ = 5458828320.

The previous prime is 12191384717. The next prime is 12191384753. The reversal of 12191384722 is 22748319121.

It is a super-2 number, since 2×12191384722² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4134003 + ... + 4136950.

It is an arithmetic number, because the mean of its divisors is an integer number (1265455962).

Almost surely, 2^12191384722 is an apocalyptic number.

12191384722 is a deficient number, since it is larger than the sum of its proper divisors (8055910670).

12191384722 is a wasteful number, since it uses less digits than its factorization.

12191384722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8271033.

The product of its digits is 48384, while the sum is 40.

The spelling of 12191384722 in words is "twelve billion, one hundred ninety-one million, three hundred eighty-four thousand, seven hundred twenty-two".