312222212233 has 4 divisors (see below), whose sum is σ = 312223406740. Its totient is φ = 312221017728.

The previous prime is 312222212201. The next prime is 312222212257. The reversal of 312222212233 is 332212222213.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 332212222213 = 42179 ⋅7876247.

It can be written as a sum of positive squares in 2 ways, for example, as 25737143184 + 286485069049 = 160428^2 + 535243^2 .

It is a cyclic number.

It is not a de Polignac number, because 312222212233 - 2⁵ = 312222212201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312222212198 and 312222212207.

It is not an unprimeable number, because it can be changed into a prime (312222212293) 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, 17760 + ... + 790417.

It is an arithmetic number, because the mean of its divisors is an integer number (78055851685).

Almost surely, 2^312222212233 is an apocalyptic number.

It is an amenable number.

312222212233 is a deficient number, since it is larger than the sum of its proper divisors (1194507).

312222212233 is an equidigital number, since it uses as much as digits as its factorization.

312222212233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194506.

The product of its digits is 3456, while the sum is 25.

Adding to 312222212233 its reverse (332212222213), we get a palindrome (644434434446).

The spelling of 312222212233 in words is "three hundred twelve billion, two hundred twenty-two million, two hundred twelve thousand, two hundred thirty-three".