1311198099 has 32 divisors (see below), whose sum is σ = 1851462144. Its totient is φ = 823764480.

The previous prime is 1311198079. The next prime is 1311198121. The reversal of 1311198099 is 9908911131.

It is a happy number.

1311198099 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1311198099 - 2⁸ = 1311197843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311198099.

It is not an unprimeable number, because it can be changed into a prime (1311198079) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1644769 + ... + 1645565.

It is an arithmetic number, because the mean of its divisors is an integer number (57858192).

Almost surely, 2^1311198099 is an apocalyptic number.

1311198099 is a deficient number, since it is larger than the sum of its proper divisors (540264045).

1311198099 is a wasteful number, since it uses less digits than its factorization.

1311198099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147.

The product of its (nonzero) digits is 17496, while the sum is 42.

The square root of 1311198099 is about 36210.4694667164. The cubic root of 1311198099 is about 1094.5176524890.

The spelling of 1311198099 in words is "one billion, three hundred eleven million, one hundred ninety-eight thousand, ninety-nine".