1311422131 has 2 divisors, whose sum is σ = 1311422132. Its totient is φ = 1311422130.

The previous prime is 1311422129. The next prime is 1311422149. The reversal of 1311422131 is 1312241131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311422131 - 2¹ = 1311422129 is a prime.

It is a super-2 number, since 2×1311422131² = 3439656011353162322, which contains 22 as substring.

Together with 1311422129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1311422099 and 1311422108.

It is not a weakly prime, because it can be changed into another prime (1311822131) 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 as a sum of consecutive naturals, namely, 655711065 + 655711066.

It is an arithmetic number, because the mean of its divisors is an integer number (655711066).

Almost surely, 2^1311422131 is an apocalyptic number.

1311422131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311422131 is an equidigital number, since it uses as much as digits as its factorization.

1311422131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 1311422131 is about 36213.5628045626. The cubic root of 1311422131 is about 1094.5799855606.

Adding to 1311422131 its reverse (1312241131), we get a palindrome (2623663262).

It can be divided in two parts, 13114 and 22131, that added together give a triangular number (35245 = T₂₆₅).

The spelling of 1311422131 in words is "one billion, three hundred eleven million, four hundred twenty-two thousand, one hundred thirty-one".