312403330333421 has 2 divisors, whose sum is σ = 312403330333422. Its totient is φ = 312403330333420.

The previous prime is 312403330333387. The next prime is 312403330333427. The reversal of 312403330333421 is 124333033304213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312224835913225 + 178494420196 = 17669885^2 + 422486^2 .

It is a cyclic number.

It is not a de Polignac number, because 312403330333421 - 2¹⁴ = 312403330317037 is a prime.

It is a super-2 number, since 2×312403330333421² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312403330333427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156201665166710 + 156201665166711.

It is an arithmetic number, because the mean of its divisors is an integer number (156201665166711).

Almost surely, 2^{312403330333421} is an apocalyptic number.

It is an amenable number.

312403330333421 is a deficient number, since it is larger than the sum of its proper divisors (1).

312403330333421 is an equidigital number, since it uses as much as digits as its factorization.

312403330333421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 35.

Adding to 312403330333421 its reverse (124333033304213), we get a palindrome (436736363637634).

The spelling of 312403330333421 in words is "three hundred twelve trillion, four hundred three billion, three hundred thirty million, three hundred thirty-three thousand, four hundred twenty-one".