1312431426021 has 8 divisors (see below), whose sum is σ = 1749932046720. Its totient is φ = 874942544672.

The previous prime is 1312431426011. The next prime is 1312431426037. The reversal of 1312431426021 is 1206241342131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312431426021 - 2⁵ = 1312431425989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312431426021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312431426011) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2670576 + ... + 3123593.

It is an arithmetic number, because the mean of its divisors is an integer number (218741505840).

Almost surely, 2^{1312431426021} is an apocalyptic number.

It is an amenable number.

1312431426021 is a deficient number, since it is larger than the sum of its proper divisors (437500620699).

1312431426021 is an equidigital number, since it uses as much as digits as its factorization.

1312431426021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5869675.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 1312431426021 its reverse (1206241342131), we get a palindrome (2518672768152).

The spelling of 1312431426021 in words is "one trillion, three hundred twelve billion, four hundred thirty-one million, four hundred twenty-six thousand, twenty-one".