10991319119 has 4 divisors (see below), whose sum is σ = 11990529960. Its totient is φ = 9992108280.

The previous prime is 10991319107. The next prime is 10991319133. The reversal of 10991319119 is 91191319901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91191319901 = 11 ⋅8290119991.

It is not a de Polignac number, because 10991319119 - 2¹⁶ = 10991253583 is a prime.

It is a super-2 number, since 2×10991319119² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10991319119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10991310119) 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, 499605404 + ... + 499605425.

It is an arithmetic number, because the mean of its divisors is an integer number (2997632490).

Almost surely, 2^10991319119 is an apocalyptic number.

10991319119 is a deficient number, since it is larger than the sum of its proper divisors (999210841).

10991319119 is an equidigital number, since it uses as much as digits as its factorization.

10991319119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999210840.

The product of its (nonzero) digits is 19683, while the sum is 44.

The spelling of 10991319119 in words is "ten billion, nine hundred ninety-one million, three hundred nineteen thousand, one hundred nineteen".