1331112209 has 8 divisors (see below), whose sum is σ = 1573728960. Its totient is φ = 1101609936.

The previous prime is 1331112187. The next prime is 1331112217. The reversal of 1331112209 is 9022111331.

1331112209 = 376² + 377² + ... + 1593².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1331112209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331111209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3278399 + ... + 3278804.

It is an arithmetic number, because the mean of its divisors is an integer number (196716120).

Almost surely, 2^1331112209 is an apocalyptic number.

It is an amenable number.

1331112209 is a deficient number, since it is larger than the sum of its proper divisors (242616751).

1331112209 is an equidigital number, since it uses as much as digits as its factorization.

1331112209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6557239.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1331112209 is about 36484.4104927022. The cubic root of 1331112209 is about 1100.0309107016.

The spelling of 1331112209 in words is "one billion, three hundred thirty-one million, one hundred twelve thousand, two hundred nine".