221000002120221 has 8 divisors (see below), whose sum is σ = 310175441572320. Its totient is φ = 139578948707472.

The previous prime is 221000002120199. The next prime is 221000002120243. The reversal of 221000002120221 is 122021200000122.

It is an interprime number because it is at equal distance from previous prime (221000002120199) and next prime (221000002120243).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221000002120221 - 2²⁷ = 220999867902493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221000002120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000002020221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1938596509770 + ... + 1938596509883.

It is an arithmetic number, because the mean of its divisors is an integer number (38771930196540).

Almost surely, 2^{221000002120221} is an apocalyptic number.

It is an amenable number.

221000002120221 is a deficient number, since it is larger than the sum of its proper divisors (89175439452099).

221000002120221 is a wasteful number, since it uses less digits than its factorization.

221000002120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877193019675.

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

Adding to 221000002120221 its reverse (122021200000122), we get a palindrome (343021202120343).

The spelling of 221000002120221 in words is "two hundred twenty-one trillion, two million, one hundred twenty thousand, two hundred twenty-one".