312132301221 has 16 divisors (see below), whose sum is σ = 454879377344. Its totient is φ = 189214527744.

The previous prime is 312132301189. The next prime is 312132301279. The reversal of 312132301221 is 122103231213.

It is not a de Polignac number, because 312132301221 - 2⁵ = 312132301189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312130301221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59724196 + ... + 59729421.

It is an arithmetic number, because the mean of its divisors is an integer number (28429961084).

Almost surely, 2^312132301221 is an apocalyptic number.

It is an amenable number.

312132301221 is a deficient number, since it is larger than the sum of its proper divisors (142747076123).

312132301221 is a wasteful number, since it uses less digits than its factorization.

312132301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119453700.

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

Adding to 312132301221 its reverse (122103231213), we get a palindrome (434235532434).

The spelling of 312132301221 in words is "three hundred twelve billion, one hundred thirty-two million, three hundred one thousand, two hundred twenty-one".