312113302221 has 24 divisors (see below), whose sum is σ = 512570229120. Its totient is φ = 167859253632.

The previous prime is 312113302199. The next prime is 312113302229. The reversal of 312113302221 is 122203311213.

It is not a de Polignac number, because 312113302221 - 2²¹ = 312111205069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312113302229) 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 23 ways as a sum of consecutive naturals, for example, 62445141 + ... + 62450138.

It is an arithmetic number, because the mean of its divisors is an integer number (21357092880).

Almost surely, 2^312113302221 is an apocalyptic number.

It is an amenable number.

312113302221 is a deficient number, since it is larger than the sum of its proper divisors (200456926899).

312113302221 is a wasteful number, since it uses less digits than its factorization.

312113302221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124895313 (or 124895306 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 312113302221 its reverse (122203311213), we get a palindrome (434316613434).

The spelling of 312113302221 in words is "three hundred twelve billion, one hundred thirteen million, three hundred two thousand, two hundred twenty-one".