1221103232003 has 4 divisors (see below), whose sum is σ = 1221108118440. Its totient is φ = 1221098345568.

The previous prime is 1221103231921. The next prime is 1221103232051. The reversal of 1221103232003 is 3002323011221.

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 1221103232003 - 2¹² = 1221103227907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221103232053) 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, 2046950 + ... + 2575307.

It is an arithmetic number, because the mean of its divisors is an integer number (305277029610).

Almost surely, 2^{1221103232003} is an apocalyptic number.

1221103232003 is a deficient number, since it is larger than the sum of its proper divisors (4886437).

1221103232003 is an equidigital number, since it uses as much as digits as its factorization.

1221103232003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4886436.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1221103232003 its reverse (3002323011221), we get a palindrome (4223426243224).

The spelling of 1221103232003 in words is "one trillion, two hundred twenty-one billion, one hundred three million, two hundred thirty-two thousand, three".