1220203001003 has 4 divisors (see below), whose sum is σ = 1394517715440. Its totient is φ = 1045888286568.

The previous prime is 1220203000997. The next prime is 1220203001021. The reversal of 1220203001003 is 3001003020221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220203001003 - 2²⁰ = 1220201952427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220203001033) 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, 87157357208 + ... + 87157357221.

It is an arithmetic number, because the mean of its divisors is an integer number (348629428860).

Almost surely, 2^{1220203001003} is an apocalyptic number.

1220203001003 is a deficient number, since it is larger than the sum of its proper divisors (174314714437).

1220203001003 is an equidigital number, since it uses as much as digits as its factorization.

1220203001003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174314714436.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 1220203001003 its reverse (3001003020221), we get a palindrome (4221206021224).

The spelling of 1220203001003 in words is "one trillion, two hundred twenty billion, two hundred three million, one thousand, three".