312100021003321 has 4 divisors (see below), whose sum is σ = 312529319519872. Its totient is φ = 311670722486772.

The previous prime is 312100021003297. The next prime is 312100021003343. The reversal of 312100021003321 is 123300120001213.

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 not a de Polignac number, because 312100021003321 - 2¹⁷ = 312100020872249 is a prime.

It is a super-2 number, since 2×312100021003321² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312100021000321) 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, 214649257185 + ... + 214649258638.

It is an arithmetic number, because the mean of its divisors is an integer number (78132329879968).

Almost surely, 2^{312100021003321} is an apocalyptic number.

It is an amenable number.

312100021003321 is a deficient number, since it is larger than the sum of its proper divisors (429298516551).

312100021003321 is an equidigital number, since it uses as much as digits as its factorization.

312100021003321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429298516550.

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

Adding to 312100021003321 its reverse (123300120001213), we get a palindrome (435400141004534).

The spelling of 312100021003321 in words is "three hundred twelve trillion, one hundred billion, twenty-one million, three thousand, three hundred twenty-one".