1312213431026 has 4 divisors (see below), whose sum is σ = 1968320146542. Its totient is φ = 656106715512.

The previous prime is 1312213431019. The next prime is 1312213431077. The reversal of 1312213431026 is 6201343122131.

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., 705598320001 + 606615111025 = 839999^2 + 778855^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1312213431026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328053357755 + ... + 328053357758.

Almost surely, 2^{1312213431026} is an apocalyptic number.

1312213431026 is a deficient number, since it is larger than the sum of its proper divisors (656106715516).

1312213431026 is an equidigital number, since it uses as much as digits as its factorization.

1312213431026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656106715515.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 1312213431026 its reverse (6201343122131), we get a palindrome (7513556553157).

The spelling of 1312213431026 in words is "one trillion, three hundred twelve billion, two hundred thirteen million, four hundred thirty-one thousand, twenty-six".