1201312303 has 4 divisors (see below), whose sum is σ = 1204715808. Its totient is φ = 1197908800.

The previous prime is 1201312289. The next prime is 1201312331. The reversal of 1201312303 is 3032131021.

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 1201312303 - 2⁵ = 1201312271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201312003) 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, 1701223 + ... + 1701928.

It is an arithmetic number, because the mean of its divisors is an integer number (301178952).

Almost surely, 2^1201312303 is an apocalyptic number.

1201312303 is a deficient number, since it is larger than the sum of its proper divisors (3403505).

1201312303 is an equidigital number, since it uses as much as digits as its factorization.

1201312303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403504.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1201312303 is about 34659.9524379362. The cubic root of 1201312303 is about 1063.0457975134.

Adding to 1201312303 its reverse (3032131021), we get a palindrome (4233443324).

The spelling of 1201312303 in words is "one billion, two hundred one million, three hundred twelve thousand, three hundred three".