11721099 has 32 divisors (see below), whose sum is σ = 17902080. Its totient is φ = 6766848.

The previous prime is 11721079. The next prime is 11721107. The reversal of 11721099 is 99012711.

It is not a de Polignac number, because 11721099 - 2¹¹ = 11719051 is a prime.

It is a super-3 number, since 3×11721099³ (a number of 22 digits) contains 333 as substring.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (11721029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65392 + ... + 65570.

It is an arithmetic number, because the mean of its divisors is an integer number (559440).

Almost surely, 2^11721099 is an apocalyptic number.

11721099 is a deficient number, since it is larger than the sum of its proper divisors (6180981).

11721099 is a wasteful number, since it uses less digits than its factorization.

11721099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 11721099 is about 3423.6090606259. The cubic root of 11721099 is about 227.1552496813.

The spelling of 11721099 in words is "eleven million, seven hundred twenty-one thousand, ninety-nine".