1321223434 has 4 divisors (see below), whose sum is σ = 1981835154. Its totient is φ = 660611716.

The previous prime is 1321223429. The next prime is 1321223443. The reversal of 1321223434 is 4343221231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1321104409 + 119025 = 36347^2 + 345^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1321223399 and 1321223408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330305857 + ... + 330305860.

Almost surely, 2^1321223434 is an apocalyptic number.

1321223434 is a deficient number, since it is larger than the sum of its proper divisors (660611720).

1321223434 is an equidigital number, since it uses as much as digits as its factorization.

1321223434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660611719.

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

The square root of 1321223434 is about 36348.6373059569. The cubic root of 1321223434 is about 1097.3001098175.

Adding to 1321223434 its reverse (4343221231), we get a palindrome (5664444665).

The spelling of 1321223434 in words is "one billion, three hundred twenty-one million, two hundred twenty-three thousand, four hundred thirty-four".