1312131122 has 4 divisors (see below), whose sum is σ = 1968196686. Its totient is φ = 656065560.

The previous prime is 1312131113. The next prime is 1312131131. The reversal of 1312131122 is 2211312131.

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

It is an interprime number because it is at equal distance from previous prime (1312131113) and next prime (1312131131).

It can be written as a sum of positive squares in only one way, i.e., 1010031961 + 302099161 = 31781^2 + 17381^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1312131122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328032779 + ... + 328032782.

Almost surely, 2^1312131122 is an apocalyptic number.

1312131122 is a deficient number, since it is larger than the sum of its proper divisors (656065564).

1312131122 is an equidigital number, since it uses as much as digits as its factorization.

1312131122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656065563.

The product of its digits is 72, while the sum is 17.

The square root of 1312131122 is about 36223.3505076491. The cubic root of 1312131122 is about 1094.7772034081. Note that the first 3 decimals are identical.

Adding to 1312131122 its reverse (2211312131), we get a palindrome (3523443253).

The spelling of 1312131122 in words is "one billion, three hundred twelve million, one hundred thirty-one thousand, one hundred twenty-two".