1311831282131 has 4 divisors (see below), whose sum is σ = 1311886501392. Its totient is φ = 1311776062872.

The previous prime is 1311831282121. The next prime is 1311831282133. The reversal of 1311831282131 is 1312821381131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1311831282131 - 2⁶ = 1311831282067 is a prime.

It is a super-2 number, since 2×1311831282131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311831282091 and 1311831282100.

It is not an unprimeable number, because it can be changed into a prime (1311831282133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27573980 + ... + 27621513.

It is an arithmetic number, because the mean of its divisors is an integer number (327971625348).

Almost surely, 2^{1311831282131} is an apocalyptic number.

1311831282131 is a deficient number, since it is larger than the sum of its proper divisors (55219261).

1311831282131 is an equidigital number, since it uses as much as digits as its factorization.

1311831282131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55219260.

The product of its digits is 6912, while the sum is 35.

The spelling of 1311831282131 in words is "one trillion, three hundred eleven billion, eight hundred thirty-one million, two hundred eighty-two thousand, one hundred thirty-one".