1222304311 has 4 divisors (see below), whose sum is σ = 1224211824. Its totient is φ = 1220396800.

The previous prime is 1222304297. The next prime is 1222304359. The reversal of 1222304311 is 1134032221.

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: 1134032221 = 7 ⋅162004603.

It is a cyclic number.

It is not a de Polignac number, because 1222304311 - 2¹⁹ = 1221780023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222304011) 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, 952795 + ... + 954076.

It is an arithmetic number, because the mean of its divisors is an integer number (306052956).

Almost surely, 2^1222304311 is an apocalyptic number.

1222304311 is a deficient number, since it is larger than the sum of its proper divisors (1907513).

1222304311 is an equidigital number, since it uses as much as digits as its factorization.

1222304311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907512.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1222304311 is about 34961.4689479719. The cubic root of 1222304311 is about 1069.2020460603.

Adding to 1222304311 its reverse (1134032221), we get a palindrome (2356336532).

The spelling of 1222304311 in words is "one billion, two hundred twenty-two million, three hundred four thousand, three hundred eleven".