1311122403 has 8 divisors (see below), whose sum is σ = 1942403600. Its totient is φ = 874081584.

The previous prime is 1311122381. The next prime is 1311122419. The reversal of 1311122403 is 3042211131.

It is not a de Polignac number, because 1311122403 - 2⁹ = 1311121891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311122443) 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, 24280018 + ... + 24280071.

It is an arithmetic number, because the mean of its divisors is an integer number (242800450).

Almost surely, 2^1311122403 is an apocalyptic number.

1311122403 is a deficient number, since it is larger than the sum of its proper divisors (631281197).

1311122403 is an equidigital number, since it uses as much as digits as its factorization.

1311122403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48560098 (or 48560092 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1311122403 is about 36209.4242290595. The cubic root of 1311122403 is about 1094.4965897672.

Adding to 1311122403 its reverse (3042211131), we get a palindrome (4353333534).

The spelling of 1311122403 in words is "one billion, three hundred eleven million, one hundred twenty-two thousand, four hundred three".