221121000003 has 4 divisors (see below), whose sum is σ = 294828000008. Its totient is φ = 147414000000.

The previous prime is 221120999989. The next prime is 221121000019. The reversal of 221121000003 is 300000121122.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 221121000003 - 2⁸ = 221120999747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221121000403) 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, 36853499998 + ... + 36853500003.

It is an arithmetic number, because the mean of its divisors is an integer number (73707000002).

Almost surely, 2^221121000003 is an apocalyptic number.

221121000003 is a deficient number, since it is larger than the sum of its proper divisors (73707000005).

221121000003 is an equidigital number, since it uses as much as digits as its factorization.

221121000003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73707000004.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 221121000003 its reverse (300000121122), we get a palindrome (521121121125).

The spelling of 221121000003 in words is "two hundred twenty-one billion, one hundred twenty-one million, three", and thus it is an aban number.