1220320322013 has 32 divisors (see below), whose sum is σ = 1795704583680. Its totient is φ = 732359554560.

The previous prime is 1220320322003. The next prime is 1220320322027. The reversal of 1220320322013 is 3102230230221.

It is a happy number.

It is not a de Polignac number, because 1220320322013 - 2⁵ = 1220320321981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220320322003) 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 31 ways as a sum of consecutive naturals, for example, 3916203 + ... + 4216311.

It is an arithmetic number, because the mean of its divisors is an integer number (56115768240).

Almost surely, 2^{1220320322013} is an apocalyptic number.

1220320322013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1220320322013 is a deficient number, since it is larger than the sum of its proper divisors (575384261667).

1220320322013 is a wasteful number, since it uses less digits than its factorization.

1220320322013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302709.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 1220320322013 its reverse (3102230230221), we get a palindrome (4322550552234).

The spelling of 1220320322013 in words is "one trillion, two hundred twenty billion, three hundred twenty million, three hundred twenty-two thousand, thirteen".