11199121647 has 12 divisors (see below), whose sum is σ = 17370066456. Its totient is φ = 6399498000.

The previous prime is 11199121643. The next prime is 11199121649. The reversal of 11199121647 is 74612199111.

11199121647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11199121647 - 2² = 11199121643 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 11199121599 and 11199121608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11199121643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38092104 + ... + 38092397.

It is an arithmetic number, because the mean of its divisors is an integer number (1447505538).

Almost surely, 2^11199121647 is an apocalyptic number.

11199121647 is a deficient number, since it is larger than the sum of its proper divisors (6170944809).

11199121647 is an equidigital number, since it uses as much as digits as its factorization.

11199121647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76184518 (or 76184511 counting only the distinct ones).

The product of its digits is 27216, while the sum is 42.

The spelling of 11199121647 in words is "eleven billion, one hundred ninety-nine million, one hundred twenty-one thousand, six hundred forty-seven".