1311050521031 has 2 divisors, whose sum is σ = 1311050521032. Its totient is φ = 1311050521030.

The previous prime is 1311050521013. The next prime is 1311050521037. The reversal of 1311050521031 is 1301250501131.

Together with previous prime (1311050521013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311050521031 - 2²² = 1311046326727 is a prime.

It is a super-2 number, since 2×1311050521031² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311050520988 and 1311050521006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311050521037) 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 as a sum of consecutive naturals, namely, 655525260515 + 655525260516.

It is an arithmetic number, because the mean of its divisors is an integer number (655525260516).

Almost surely, 2^{1311050521031} is an apocalyptic number.

1311050521031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311050521031 is an equidigital number, since it uses as much as digits as its factorization.

1311050521031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 23.

The spelling of 1311050521031 in words is "one trillion, three hundred eleven billion, fifty million, five hundred twenty-one thousand, thirty-one".