312030001021 has 4 divisors (see below), whose sum is σ = 312031240444. Its totient is φ = 312028761600.

The previous prime is 312030001007. The next prime is 312030001033. The reversal of 312030001021 is 120100030213.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 147656516121 + 164373484900 = 384261^2 + 405430^2 .

It is a cyclic number.

It is not a de Polignac number, because 312030001021 - 2¹³ = 312029992829 is a prime.

It is a super-2 number, since 2×312030001021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312030000992 and 312030001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312030001091) 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, 92670 + ... + 795391.

It is an arithmetic number, because the mean of its divisors is an integer number (78007810111).

Almost surely, 2^312030001021 is an apocalyptic number.

It is an amenable number.

312030001021 is a deficient number, since it is larger than the sum of its proper divisors (1239423).

312030001021 is an equidigital number, since it uses as much as digits as its factorization.

312030001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239422.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 312030001021 its reverse (120100030213), we get a palindrome (432130031234).

The spelling of 312030001021 in words is "three hundred twelve billion, thirty million, one thousand, twenty-one".