312321003121 has 4 divisors (see below), whose sum is σ = 330692826852. Its totient is φ = 293949179392.

The previous prime is 312321003109. The next prime is 312321003131. The reversal of 312321003121 is 121300123213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 221804263521 + 90516739600 = 470961^2 + 300860^2 .

It is a cyclic number.

It is not a de Polignac number, because 312321003121 - 2¹⁷ = 312320872049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312321003131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9185911840 + ... + 9185911873.

It is an arithmetic number, because the mean of its divisors is an integer number (82673206713).

Almost surely, 2^312321003121 is an apocalyptic number.

It is an amenable number.

312321003121 is a deficient number, since it is larger than the sum of its proper divisors (18371823731).

312321003121 is a wasteful number, since it uses less digits than its factorization.

312321003121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18371823730.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 312321003121 its reverse (121300123213), we get a palindrome (433621126334).

The spelling of 312321003121 in words is "three hundred twelve billion, three hundred twenty-one million, three thousand, one hundred twenty-one".