1311123201003 has 60 divisors (see below), whose sum is σ = 2410204726488. Its totient is φ = 681102838080.

The previous prime is 1311123200953. The next prime is 1311123201023. The reversal of 1311123201003 is 3001023211131.

1311123201003 is a `hidden beast` number, since 131 + 112 + 320 + 100 + 3 = 666.

It is not a de Polignac number, because 1311123201003 - 2¹⁰ = 1311123199979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311123201023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2520250 + ... + 2995647.

Almost surely, 2^{1311123201003} is an apocalyptic number.

1311123201003 is a deficient number, since it is larger than the sum of its proper divisors (1099081525485).

1311123201003 is an equidigital number, since it uses as much as digits as its factorization.

1311123201003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5515942 (or 5515918 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1311123201003 its reverse (3001023211131), we get a palindrome (4312146412134).

The spelling of 1311123201003 in words is "one trillion, three hundred eleven billion, one hundred twenty-three million, two hundred one thousand, three".