1222212323 has 4 divisors (see below), whose sum is σ = 1222768320. Its totient is φ = 1221656328.

The previous prime is 1222212281. The next prime is 1222212359. The reversal of 1222212323 is 3232122221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3232122221 = 137 ⋅23592133.

It is a cyclic number.

It is not a de Polignac number, because 1222212323 - 2¹⁰ = 1222211299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222212295 and 1222212304.

It is not an unprimeable number, because it can be changed into a prime (1222212023) 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 3 ways as a sum of consecutive naturals, for example, 274688 + ... + 279101.

It is an arithmetic number, because the mean of its divisors is an integer number (305692080).

Almost surely, 2^1222212323 is an apocalyptic number.

1222212323 is a deficient number, since it is larger than the sum of its proper divisors (555997).

1222212323 is an equidigital number, since it uses as much as digits as its factorization.

1222212323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555996.

The product of its digits is 576, while the sum is 20.

The square root of 1222212323 is about 34960.1533606476. The cubic root of 1222212323 is about 1069.1752234367.

Adding to 1222212323 its reverse (3232122221), we get a palindrome (4454334544).

The spelling of 1222212323 in words is "one billion, two hundred twenty-two million, two hundred twelve thousand, three hundred twenty-three".