1311312020203 has 8 divisors (see below), whose sum is σ = 1339234790400. Its totient is φ = 1283390188200.

The previous prime is 1311312020197. The next prime is 1311312020209. The reversal of 1311312020203 is 3020202131131.

It is an interprime number because it is at equal distance from previous prime (1311312020197) and next prime (1311312020209).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311312020203 - 2¹³ = 1311312012011 is a prime.

It is a super-2 number, since 2×1311312020203² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311312020209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3085678 + ... + 3484828.

It is an arithmetic number, because the mean of its divisors is an integer number (167404348800).

Almost surely, 2^{1311312020203} is an apocalyptic number.

1311312020203 is a deficient number, since it is larger than the sum of its proper divisors (27922770197).

1311312020203 is an equidigital number, since it uses as much as digits as its factorization.

1311312020203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469097.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1311312020203 its reverse (3020202131131), we get a palindrome (4331514151334).

The spelling of 1311312020203 in words is "one trillion, three hundred eleven billion, three hundred twelve million, twenty thousand, two hundred three".