312444521135321 has 4 divisors (see below), whose sum is σ = 312447514032000. Its totient is φ = 312441528238644.

The previous prime is 312444521135297. The next prime is 312444521135381. The reversal of 312444521135321 is 123531125444213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312444521135321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312444521135381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1496291741 + ... + 1496500538.

It is an arithmetic number, because the mean of its divisors is an integer number (78111878508000).

Almost surely, 2^{312444521135321} is an apocalyptic number.

It is an amenable number.

312444521135321 is a deficient number, since it is larger than the sum of its proper divisors (2992896679).

312444521135321 is a wasteful number, since it uses less digits than its factorization.

312444521135321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992896678.

The product of its digits is 345600, while the sum is 41.

Adding to 312444521135321 its reverse (123531125444213), we get a palindrome (435975646579534).

The spelling of 312444521135321 in words is "three hundred twelve trillion, four hundred forty-four billion, five hundred twenty-one million, one hundred thirty-five thousand, three hundred twenty-one".