221000221020201 has 24 divisors (see below), whose sum is σ = 342787967835840. Its totient is φ = 126281377226592.

The previous prime is 221000221020119. The next prime is 221000221020217. The reversal of 221000221020201 is 102020122000122.

It is not a de Polignac number, because 221000221020201 - 2¹⁰ = 221000221019177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221000221020001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22392021 + ... + 30714866.

It is an arithmetic number, because the mean of its divisors is an integer number (14282831993160).

Almost surely, 2^{221000221020201} is an apocalyptic number.

221000221020201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221000221020201 is a deficient number, since it is larger than the sum of its proper divisors (121787746815639).

221000221020201 is a wasteful number, since it uses less digits than its factorization.

221000221020201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53135213 (or 53135206 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221000221020201 its reverse (102020122000122), we get a palindrome (323020343020323).

The spelling of 221000221020201 in words is "two hundred twenty-one trillion, two hundred twenty-one million, twenty thousand, two hundred one".