11311221099 has 16 divisors (see below), whose sum is σ = 16074547200. Its totient is φ = 7050230400.

The previous prime is 11311221011. The next prime is 11311221101. The reversal of 11311221099 is 99012211311.

It is not a de Polignac number, because 11311221099 - 2¹² = 11311217003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11311221899) 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, 726699 + ... + 742100.

It is an arithmetic number, because the mean of its divisors is an integer number (1004659200).

Almost surely, 2^11311221099 is an apocalyptic number.

11311221099 is a deficient number, since it is larger than the sum of its proper divisors (4763326101).

11311221099 is a wasteful number, since it uses less digits than its factorization.

11311221099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468970.

The product of its (nonzero) digits is 972, while the sum is 30.

The spelling of 11311221099 in words is "eleven billion, three hundred eleven million, two hundred twenty-one thousand, ninety-nine".