312223300121 has 4 divisors (see below), whose sum is σ = 313001912244. Its totient is φ = 311444688000.

The previous prime is 312223300087. The next prime is 312223300153. The reversal of 312223300121 is 121003322213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121003322213 = 1823 ⋅66375931.

It can be written as a sum of positive squares in 2 ways, for example, as 297885632521 + 14337667600 = 545789^2 + 119740^2 .

It is a cyclic number.

It is not a de Polignac number, because 312223300121 - 2³⁴ = 295043430937 is a prime.

It is a super-2 number, since 2×312223300121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312223300093 and 312223300102.

It is not an unprimeable number, because it can be changed into a prime (312223300171) 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, 389305460 + ... + 389306261.

It is an arithmetic number, because the mean of its divisors is an integer number (78250478061).

Almost surely, 2^312223300121 is an apocalyptic number.

It is an amenable number.

312223300121 is a deficient number, since it is larger than the sum of its proper divisors (778612123).

312223300121 is an equidigital number, since it uses as much as digits as its factorization.

312223300121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778612122.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 312223300121 its reverse (121003322213), we get a palindrome (433226622334).

The spelling of 312223300121 in words is "three hundred twelve billion, two hundred twenty-three million, three hundred thousand, one hundred twenty-one".