312220330213 has 4 divisors (see below), whose sum is σ = 340603996608. Its totient is φ = 283836663820.

The previous prime is 312220330199. The next prime is 312220330237. The reversal of 312220330213 is 312033022213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 312033022213 = 11 ⋅28366638383.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312220330213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312220330313) 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, 14191833181 + ... + 14191833202.

It is an arithmetic number, because the mean of its divisors is an integer number (85150999152).

Almost surely, 2^312220330213 is an apocalyptic number.

It is an amenable number.

312220330213 is a deficient number, since it is larger than the sum of its proper divisors (28383666395).

312220330213 is a wasteful number, since it uses less digits than its factorization.

312220330213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28383666394.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 312220330213 its reverse (312033022213), we get a palindrome (624253352426).

The spelling of 312220330213 in words is "three hundred twelve billion, two hundred twenty million, three hundred thirty thousand, two hundred thirteen".