1221133312203 has 64 divisors (see below), whose sum is σ = 1912210747392. Its totient is φ = 678646200960.

The previous prime is 1221133312193. The next prime is 1221133312247. The reversal of 1221133312203 is 3022133311221.

It is not a de Polignac number, because 1221133312203 - 2⁹ = 1221133311691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221133312283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 335198100 + ... + 335201742.

It is an arithmetic number, because the mean of its divisors is an integer number (29878292928).

Almost surely, 2^{1221133312203} is an apocalyptic number.

1221133312203 is a deficient number, since it is larger than the sum of its proper divisors (691077435189).

1221133312203 is a wasteful number, since it uses less digits than its factorization.

1221133312203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5184.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1221133312203 its reverse (3022133311221), we get a palindrome (4243266623424).

The spelling of 1221133312203 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-three million, three hundred twelve thousand, two hundred three".