1220322013 has 4 divisors (see below), whose sum is σ = 1223542240. Its totient is φ = 1217101788.

The previous prime is 1220322007. The next prime is 1220322043. The reversal of 1220322013 is 3102230221.

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: 3102230221 = 151 ⋅20544571.

It is a cyclic number.

It is not a de Polignac number, because 1220322013 - 2¹⁷ = 1220190941 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 (1220322043) 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, 1609545 + ... + 1610302.

It is an arithmetic number, because the mean of its divisors is an integer number (305885560).

Almost surely, 2^1220322013 is an apocalyptic number.

It is an amenable number.

1220322013 is a deficient number, since it is larger than the sum of its proper divisors (3220227).

1220322013 is an equidigital number, since it uses as much as digits as its factorization.

1220322013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220226.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1220322013 is about 34933.1076917013. The cubic root of 1220322013 is about 1068.6237329346.

Adding to 1220322013 its reverse (3102230221), we get a palindrome (4322552234).

The spelling of 1220322013 in words is "one billion, two hundred twenty million, three hundred twenty-two thousand, thirteen".