1311201122303 has 4 divisors (see below), whose sum is σ = 1311491279760. Its totient is φ = 1310910964848.

The previous prime is 1311201122299. The next prime is 1311201122321. The reversal of 1311201122303 is 3032211021131.

It is a happy number.

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 1311201122303 - 2² = 1311201122299 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 (1311201121303) 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, 145071950 + ... + 145080987.

It is an arithmetic number, because the mean of its divisors is an integer number (327872819940).

Almost surely, 2^{1311201122303} is an apocalyptic number.

1311201122303 is a deficient number, since it is larger than the sum of its proper divisors (290157457).

1311201122303 is an equidigital number, since it uses as much as digits as its factorization.

1311201122303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290157456.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1311201122303 its reverse (3032211021131), we get a palindrome (4343412143434).

The spelling of 1311201122303 in words is "one trillion, three hundred eleven billion, two hundred one million, one hundred twenty-two thousand, three hundred three".