1220003311323 has 16 divisors (see below), whose sum is σ = 1630850112000. Its totient is φ = 811246964640.

The previous prime is 1220003311199. The next prime is 1220003311369. The reversal of 1220003311323 is 3231133000221.

It is not a de Polignac number, because 1220003311323 - 2¹² = 1220003307227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220003311323.

It is not an unprimeable number, because it can be changed into a prime (1220003311823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5184913 + ... + 5415101.

It is an arithmetic number, because the mean of its divisors is an integer number (101928132000).

Almost surely, 2^{1220003311323} is an apocalyptic number.

1220003311323 is a deficient number, since it is larger than the sum of its proper divisors (410846800677).

1220003311323 is a wasteful number, since it uses less digits than its factorization.

1220003311323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234722.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1220003311323 its reverse (3231133000221), we get a palindrome (4451136311544).

The spelling of 1220003311323 in words is "one trillion, two hundred twenty billion, three million, three hundred eleven thousand, three hundred twenty-three".