1221102234203 has 4 divisors (see below), whose sum is σ = 1221183563880. Its totient is φ = 1221020904528.

The previous prime is 1221102234167. The next prime is 1221102234221. The reversal of 1221102234203 is 3024322011221.

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 1221102234203 - 2²⁶ = 1221035125339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221102234223) 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 3 ways as a sum of consecutive naturals, for example, 40642313 + ... + 40672346.

It is an arithmetic number, because the mean of its divisors is an integer number (305295890970).

Almost surely, 2^{1221102234203} is an apocalyptic number.

1221102234203 is a deficient number, since it is larger than the sum of its proper divisors (81329677).

1221102234203 is an equidigital number, since it uses as much as digits as its factorization.

1221102234203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81329676.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1221102234203 its reverse (3024322011221), we get a palindrome (4245424245424).

The spelling of 1221102234203 in words is "one trillion, two hundred twenty-one billion, one hundred two million, two hundred thirty-four thousand, two hundred three".