1220331323 has 4 divisors (see below), whose sum is σ = 1222410840. Its totient is φ = 1218251808.

The previous prime is 1220331311. The next prime is 1220331361. The reversal of 1220331323 is 3231330221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3231330221 = 7 ⋅461618603.

It is a cyclic number.

It is not a de Polignac number, because 1220331323 - 2²⁰ = 1219282747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220331295 and 1220331304.

It is not an unprimeable number, because it can be changed into a prime (1220331823) 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, 1038878 + ... + 1040051.

It is an arithmetic number, because the mean of its divisors is an integer number (305602710).

Almost surely, 2^1220331323 is an apocalyptic number.

1220331323 is a deficient number, since it is larger than the sum of its proper divisors (2079517).

1220331323 is an equidigital number, since it uses as much as digits as its factorization.

1220331323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079516.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1220331323 is about 34933.2409461247. The cubic root of 1220331323 is about 1068.6264504855.

Adding to 1220331323 its reverse (3231330221), we get a palindrome (4451661544).

The spelling of 1220331323 in words is "one billion, two hundred twenty million, three hundred thirty-one thousand, three hundred twenty-three".