231221220003 has 10 divisors (see below), whose sum is σ = 345404538644. Its totient is φ = 154147479948.

The previous prime is 231221220001. The next prime is 231221220017. The reversal of 231221220003 is 300022122132.

It is not a de Polignac number, because 231221220003 - 2¹ = 231221220001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231221220001) 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 9 ways as a sum of consecutive naturals, for example, 1427291401 + ... + 1427291562.

Almost surely, 2^231221220003 is an apocalyptic number.

231221220003 is a deficient number, since it is larger than the sum of its proper divisors (114183318641).

231221220003 is an equidigital number, since it uses as much as digits as its factorization.

231221220003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2854582975 (or 2854582966 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 231221220003 its reverse (300022122132), we get a palindrome (531243342135).

The spelling of 231221220003 in words is "two hundred thirty-one billion, two hundred twenty-one million, two hundred twenty thousand, three".