1111221203203 has 4 divisors (see below), whose sum is σ = 1111337121960. Its totient is φ = 1111105284448.

The previous prime is 1111221203189. The next prime is 1111221203207. The reversal of 1111221203203 is 3023021221111.

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 1111221203203 - 2¹³ = 1111221195011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111221203207) 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 3 ways as a sum of consecutive naturals, for example, 57944998 + ... + 57964171.

It is an arithmetic number, because the mean of its divisors is an integer number (277834280490).

Almost surely, 2^{1111221203203} is an apocalyptic number.

1111221203203 is a deficient number, since it is larger than the sum of its proper divisors (115918757).

1111221203203 is an equidigital number, since it uses as much as digits as its factorization.

1111221203203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115918756.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1111221203203 its reverse (3023021221111), we get a palindrome (4134242424314).

The spelling of 1111221203203 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, two hundred three thousand, two hundred three".