1312111233131 has 4 divisors (see below), whose sum is σ = 1313061351264. Its totient is φ = 1311161115000.

The previous prime is 1312111233119. The next prime is 1312111233163. The reversal of 1312111233131 is 1313321112131.

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 1312111233131 - 2⁶ = 1312111233067 is a prime.

It is a super-3 number, since 3×1312111233131³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312111233097 and 1312111233106.

It is not an unprimeable number, because it can be changed into a prime (1312111235131) 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, 475056995 + ... + 475059756.

It is an arithmetic number, because the mean of its divisors is an integer number (328265337816).

Almost surely, 2^{1312111233131} is an apocalyptic number.

1312111233131 is a deficient number, since it is larger than the sum of its proper divisors (950118133).

1312111233131 is an equidigital number, since it uses as much as digits as its factorization.

1312111233131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950118132.

The product of its digits is 324, while the sum is 23.

Adding to 1312111233131 its reverse (1313321112131), we get a palindrome (2625432345262).

The spelling of 1312111233131 in words is "one trillion, three hundred twelve billion, one hundred eleven million, two hundred thirty-three thousand, one hundred thirty-one".