312321001421 has 32 divisors (see below), whose sum is σ = 391717420416. Its totient is φ = 246670406400.

The previous prime is 312321001409. The next prime is 312321001451. The reversal of 312321001421 is 124100123213.

It is not a de Polignac number, because 312321001421 - 2⁶ = 312321001357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312321001393 and 312321001402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312321001451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236735 + ... + 825036.

It is an arithmetic number, because the mean of its divisors is an integer number (12241169388).

Almost surely, 2^312321001421 is an apocalyptic number.

It is an amenable number.

312321001421 is a deficient number, since it is larger than the sum of its proper divisors (79396418995).

312321001421 is a wasteful number, since it uses less digits than its factorization.

312321001421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061834 (or 1061812 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 312321001421 its reverse (124100123213), we get a palindrome (436421124634).

The spelling of 312321001421 in words is "three hundred twelve billion, three hundred twenty-one million, one thousand, four hundred twenty-one".