1222313321 has 4 divisors (see below), whose sum is σ = 1222844544. Its totient is φ = 1221782100.

The previous prime is 1222313299. The next prime is 1222313327. The reversal of 1222313321 is 1233132221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1233132221 = 1933 ⋅637937.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222313321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222313293 and 1222313302.

It is not an unprimeable number, because it can be changed into a prime (1222313327) 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, 262145 + ... + 266766.

It is an arithmetic number, because the mean of its divisors is an integer number (305711136).

Almost surely, 2^1222313321 is an apocalyptic number.

It is an amenable number.

1222313321 is a deficient number, since it is larger than the sum of its proper divisors (531223).

1222313321 is an equidigital number, since it uses as much as digits as its factorization.

1222313321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531222.

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

The square root of 1222313321 is about 34961.5978038762. The cubic root of 1222313321 is about 1069.2046731984.

Adding to 1222313321 its reverse (1233132221), we get a palindrome (2455445542).

The spelling of 1222313321 in words is "one billion, two hundred twenty-two million, three hundred thirteen thousand, three hundred twenty-one".