221000201332021 has 4 divisors (see below), whose sum is σ = 221000241010432. Its totient is φ = 221000161653612.

The previous prime is 221000201332007. The next prime is 221000201332093. The reversal of 221000201332021 is 120233102000122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221000201332021 - 2⁹ = 221000201331509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221000201332021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000201330021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9786645 + ... + 23190058.

It is an arithmetic number, because the mean of its divisors is an integer number (55250060252608).

Almost surely, 2^{221000201332021} is an apocalyptic number.

It is an amenable number.

221000201332021 is a deficient number, since it is larger than the sum of its proper divisors (39678411).

221000201332021 is an equidigital number, since it uses as much as digits as its factorization.

221000201332021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39678410.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221000201332021 its reverse (120233102000122), we get a palindrome (341233303332143).

The spelling of 221000201332021 in words is "two hundred twenty-one trillion, two hundred one million, three hundred thirty-two thousand, twenty-one".