1312023001018 has 4 divisors (see below), whose sum is σ = 1968034501530. Its totient is φ = 656011500508.

The previous prime is 1312023000991. The next prime is 1312023001019. The reversal of 1312023001018 is 8101003202131.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1264021258369 + 48001742649 = 1124287^2 + 219093^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1312023001018.

It is not an unprimeable number, because it can be changed into a prime (1312023001019) 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 as a sum of consecutive naturals, namely, 328005750253 + ... + 328005750256.

Almost surely, 2^{1312023001018} is an apocalyptic number.

1312023001018 is a deficient number, since it is larger than the sum of its proper divisors (656011500512).

1312023001018 is an equidigital number, since it uses as much as digits as its factorization.

1312023001018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656011500511.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 1312023001018 its reverse (8101003202131), we get a palindrome (9413026203149).

The spelling of 1312023001018 in words is "one trillion, three hundred twelve billion, twenty-three million, one thousand, eighteen".