1312131022 has 4 divisors (see below), whose sum is σ = 1968196536. Its totient is φ = 656065510.

The previous prime is 1312131011. The next prime is 1312131047. The reversal of 1312131022 is 2201312131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2201312131 = 281 ⋅7833851.

It is a junction number, because it is equal to n+sod(n) for n = 1312130987 and 1312131005.

It is a congruent number.

It is an unprimeable number.

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, 328032754 + ... + 328032757.

It is an arithmetic number, because the mean of its divisors is an integer number (492049134).

Almost surely, 2^1312131022 is an apocalyptic number.

1312131022 is a deficient number, since it is larger than the sum of its proper divisors (656065514).

1312131022 is an equidigital number, since it uses as much as digits as its factorization.

1312131022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656065513.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1312131022 is about 36223.3491273239. The cubic root of 1312131022 is about 1094.7771755964. Note that the first 3 decimals are identical.

Adding to 1312131022 its reverse (2201312131), we get a palindrome (3513443153).

The spelling of 1312131022 in words is "one billion, three hundred twelve million, one hundred thirty-one thousand, twenty-two".