1312443421421 has 8 divisors (see below), whose sum is σ = 1445932267488. Its totient is φ = 1181317210000.

The previous prime is 1312443421411. The next prime is 1312443421423. The reversal of 1312443421421 is 1241243442131.

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

It is not a de Polignac number, because 1312443421421 - 2³⁰ = 1311369679597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312443421423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590657495 + ... + 590659716.

It is an arithmetic number, because the mean of its divisors is an integer number (180741533436).

Almost surely, 2^{1312443421421} is an apocalyptic number.

1312443421421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1312443421421 is a deficient number, since it is larger than the sum of its proper divisors (133488846067).

1312443421421 is a wasteful number, since it uses less digits than its factorization.

1312443421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181317323.

The product of its digits is 18432, while the sum is 32.

Adding to 1312443421421 its reverse (1241243442131), we get a palindrome (2553686863552).

The spelling of 1312443421421 in words is "one trillion, three hundred twelve billion, four hundred forty-three million, four hundred twenty-one thousand, four hundred twenty-one".