1220443405003 has 12 divisors (see below), whose sum is σ = 1241103215352. Its totient is φ = 1200119833440.

The previous prime is 1220443405001. The next prime is 1220443405009. The reversal of 1220443405003 is 3005043440221.

It is a happy number.

It is not a de Polignac number, because 1220443405003 - 2¹ = 1220443405001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220443405001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2325151 + ... + 2801287.

It is an arithmetic number, because the mean of its divisors is an integer number (103425267946).

Almost surely, 2^{1220443405003} is an apocalyptic number.

1220443405003 is a deficient number, since it is larger than the sum of its proper divisors (20659810349).

1220443405003 is an frugal number, since it uses more digits than its factorization.

1220443405003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476842 (or 476775 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 1220443405003 its reverse (3005043440221), we get a palindrome (4225486845224).

The spelling of 1220443405003 in words is "one trillion, two hundred twenty billion, four hundred forty-three million, four hundred five thousand, three".