221020020003 has 4 divisors (see below), whose sum is σ = 294693360008. Its totient is φ = 147346680000.

The previous prime is 221020019993. The next prime is 221020020007. The reversal of 221020020003 is 300020020122.

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

It is not a de Polignac number, because 221020020003 - 2⁸ = 221020019747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221020020007) 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, 36836669998 + ... + 36836670003.

It is an arithmetic number, because the mean of its divisors is an integer number (73673340002).

Almost surely, 2^221020020003 is an apocalyptic number.

221020020003 is a deficient number, since it is larger than the sum of its proper divisors (73673340005).

221020020003 is an equidigital number, since it uses as much as digits as its factorization.

221020020003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73673340004.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 221020020003 its reverse (300020020122), we get a palindrome (521040040125).

The spelling of 221020020003 in words is "two hundred twenty-one billion, twenty million, twenty thousand, three".