1311031110203 has 2 divisors, whose sum is σ = 1311031110204. Its totient is φ = 1311031110202.

The previous prime is 1311031110187. The next prime is 1311031110223. The reversal of 1311031110203 is 3020111301131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311031110203 - 2⁴ = 1311031110187 is a prime.

It is a super-2 number, since 2×1311031110203² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1311031110223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655515555101 + 655515555102.

It is an arithmetic number, because the mean of its divisors is an integer number (655515555102).

Almost surely, 2^{1311031110203} is an apocalyptic number.

1311031110203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311031110203 is an equidigital number, since it uses as much as digits as its factorization.

1311031110203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 1311031110203 its reverse (3020111301131), we get a palindrome (4331142411334).

The spelling of 1311031110203 in words is "one trillion, three hundred eleven billion, thirty-one million, one hundred ten thousand, two hundred three".