1331203099 has 4 divisors (see below), whose sum is σ = 1401266440. Its totient is φ = 1261139760.

The previous prime is 1331203091. The next prime is 1331203109. The reversal of 1331203099 is 9903021331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1331203099 - 2³ = 1331203091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1331203099.

It is not an unprimeable number, because it can be changed into a prime (1331203091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35031642 + ... + 35031679.

It is an arithmetic number, because the mean of its divisors is an integer number (350316610).

Almost surely, 2^1331203099 is an apocalyptic number.

1331203099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1331203099 is a deficient number, since it is larger than the sum of its proper divisors (70063341).

1331203099 is an equidigital number, since it uses as much as digits as its factorization.

1331203099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70063340.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 1331203099 is about 36485.6560719415. The cubic root of 1331203099 is about 1100.0559472921.

The spelling of 1331203099 in words is "one billion, three hundred thirty-one million, two hundred three thousand, ninety-nine".