1221103132003 has 4 divisors (see below), whose sum is σ = 1260493555648. Its totient is φ = 1181712708360.

The previous prime is 1221103131961. The next prime is 1221103132019. The reversal of 1221103132003 is 3002313011221.

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 1221103132003 - 2¹³ = 1221103123811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221103132063) 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, 19695211776 + ... + 19695211837.

It is an arithmetic number, because the mean of its divisors is an integer number (315123388912).

Almost surely, 2^{1221103132003} is an apocalyptic number.

1221103132003 is a deficient number, since it is larger than the sum of its proper divisors (39390423645).

1221103132003 is an equidigital number, since it uses as much as digits as its factorization.

1221103132003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39390423644.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1221103132003 its reverse (3002313011221), we get a palindrome (4223416143224).

The spelling of 1221103132003 in words is "one trillion, two hundred twenty-one billion, one hundred three million, one hundred thirty-two thousand, three".