312440330421 has 12 divisors (see below), whose sum is σ = 451458198048. Its totient is φ = 208221785064.

The previous prime is 312440330353. The next prime is 312440330437. The reversal of 312440330421 is 124033044213.

312440330421 is a `hidden beast` number, since 312 + 4 + 40 + 3 + 304 + 2 + 1 = 666.

It is not a de Polignac number, because 312440330421 - 2¹¹ = 312440328373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312440330221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5953135 + ... + 6005388.

It is an arithmetic number, because the mean of its divisors is an integer number (37621516504).

Almost surely, 2^312440330421 is an apocalyptic number.

It is an amenable number.

312440330421 is a deficient number, since it is larger than the sum of its proper divisors (139017867627).

312440330421 is a wasteful number, since it uses less digits than its factorization.

312440330421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11961432 (or 11961429 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 312440330421 its reverse (124033044213), we get a palindrome (436473374634).

The spelling of 312440330421 in words is "three hundred twelve billion, four hundred forty million, three hundred thirty thousand, four hundred twenty-one".