312043342221 has 120 divisors (see below), whose sum is σ = 529561359360. Its totient is φ = 182777212800.

The previous prime is 312043342207. The next prime is 312043342249. The reversal of 312043342221 is 122243340213.

312043342221 is a `hidden beast` number, since 3 + 1 + 2 + 0 + 433 + 4 + 2 + 221 = 666.

It is not a de Polignac number, because 312043342221 - 2⁶ = 312043342157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312043342201) 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 119 ways as a sum of consecutive naturals, for example, 28180116 + ... + 28191186.

It is an arithmetic number, because the mean of its divisors is an integer number (4413011328).

Almost surely, 2^312043342221 is an apocalyptic number.

It is an amenable number.

312043342221 is a deficient number, since it is larger than the sum of its proper divisors (217518017139).

312043342221 is a wasteful number, since it uses less digits than its factorization.

312043342221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11209 (or 11187 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 312043342221 its reverse (122243340213), we get a palindrome (434286682434).

The spelling of 312043342221 in words is "three hundred twelve billion, forty-three million, three hundred forty-two thousand, two hundred twenty-one".