312332220121 has 4 divisors (see below), whose sum is σ = 318225280932. Its totient is φ = 306439159312.

The previous prime is 312332220091. The next prime is 312332220127. The reversal of 312332220121 is 121022233213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144543675721 + 167788544400 = 380189^2 + 409620^2 .

It is a cyclic number.

It is not a de Polignac number, because 312332220121 - 2²⁵ = 312298665689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312332220092 and 312332220101.

It is not an unprimeable number, because it can be changed into a prime (312332220127) 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, 2946530326 + ... + 2946530431.

It is an arithmetic number, because the mean of its divisors is an integer number (79556320233).

Almost surely, 2^312332220121 is an apocalyptic number.

It is an amenable number.

312332220121 is a deficient number, since it is larger than the sum of its proper divisors (5893060811).

312332220121 is an equidigital number, since it uses as much as digits as its factorization.

312332220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5893060810.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 312332220121 its reverse (121022233213), we get a palindrome (433354453334).

The spelling of 312332220121 in words is "three hundred twelve billion, three hundred thirty-two million, two hundred twenty thousand, one hundred twenty-one".