1310123131 has 4 divisors (see below), whose sum is σ = 1379077000. Its totient is φ = 1241169264.

The previous prime is 1310123119. The next prime is 1310123149. The reversal of 1310123131 is 1313210131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1313210131 = 3371 ⋅389561.

It is a cyclic number.

It is not a de Polignac number, because 1310123131 - 2¹⁷ = 1309992059 is a prime.

It is a super-2 number, since 2×1310123131² = 3432845236762486322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1310123531) 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 3 ways as a sum of consecutive naturals, for example, 34476906 + ... + 34476943.

It is an arithmetic number, because the mean of its divisors is an integer number (344769250).

Almost surely, 2^1310123131 is an apocalyptic number.

1310123131 is a deficient number, since it is larger than the sum of its proper divisors (68953869).

1310123131 is an equidigital number, since it uses as much as digits as its factorization.

1310123131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68953868.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1310123131 is about 36195.6230917496. The cubic root of 1310123131 is about 1094.2184622214.

Adding to 1310123131 its reverse (1313210131), we get a palindrome (2623333262).

The spelling of 1310123131 in words is "one billion, three hundred ten million, one hundred twenty-three thousand, one hundred thirty-one".