11521319999 has 16 divisors (see below), whose sum is σ = 13531365888. Its totient is φ = 9602636832.

The previous prime is 11521319993. The next prime is 11521320017. The reversal of 11521319999 is 99991312511.

It is a cyclic number.

It is not a de Polignac number, because 11521319999 - 2⁴ = 11521319983 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 (11521319993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439742 + ... + 465204.

It is an arithmetic number, because the mean of its divisors is an integer number (845710368).

Almost surely, 2^11521319999 is an apocalyptic number.

11521319999 is a deficient number, since it is larger than the sum of its proper divisors (2010045889).

11521319999 is a wasteful number, since it uses less digits than its factorization.

11521319999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27254.

The product of its digits is 196830, while the sum is 50.

The spelling of 11521319999 in words is "eleven billion, five hundred twenty-one million, three hundred nineteen thousand, nine hundred ninety-nine".