312110213311221 has 16 divisors (see below), whose sum is σ = 450661932423360. Its totient is φ = 190994818970880.

The previous prime is 312110213311189. The next prime is 312110213311261. The reversal of 312110213311221 is 122113312011213.

It is not a de Polignac number, because 312110213311221 - 2⁵ = 312110213311189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312110213311191 and 312110213311200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312110213311261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22354255540 + ... + 22354269501.

It is an arithmetic number, because the mean of its divisors is an integer number (28166370776460).

Almost surely, 2^{312110213311221} is an apocalyptic number.

It is an amenable number.

312110213311221 is a deficient number, since it is larger than the sum of its proper divisors (138551719112139).

312110213311221 is a wasteful number, since it uses less digits than its factorization.

312110213311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44708525236.

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 312110213311221 its reverse (122113312011213), we get a palindrome (434223525322434).

The spelling of 312110213311221 in words is "three hundred twelve trillion, one hundred ten billion, two hundred thirteen million, three hundred eleven thousand, two hundred twenty-one".