221221112003 has 4 divisors (see below), whose sum is σ = 228849426240. Its totient is φ = 213592797768.

The previous prime is 221221111987. The next prime is 221221112011. The reversal of 221221112003 is 300211122122.

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 221221112003 - 2⁴ = 221221111987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221221112023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3814157075 + ... + 3814157132.

It is an arithmetic number, because the mean of its divisors is an integer number (57212356560).

Almost surely, 2^221221112003 is an apocalyptic number.

221221112003 is a deficient number, since it is larger than the sum of its proper divisors (7628314237).

221221112003 is an equidigital number, since it uses as much as digits as its factorization.

221221112003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7628314236.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221221112003 its reverse (300211122122), we get a palindrome (521432234125).

The spelling of 221221112003 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred twelve thousand, three".