221000012102221 has 8 divisors (see below), whose sum is σ = 241108822144800. Its totient is φ = 200894185368240.

The previous prime is 221000012102203. The next prime is 221000012102263. The reversal of 221000012102221 is 122201210000122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 221000012102221 - 2⁹ = 221000012101709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221000012102195 and 221000012102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000012102201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745672251 + ... + 745968568.

It is an arithmetic number, because the mean of its divisors is an integer number (30138602768100).

Almost surely, 2^{221000012102221} is an apocalyptic number.

It is an amenable number.

221000012102221 is a deficient number, since it is larger than the sum of its proper divisors (20108810042579).

221000012102221 is a wasteful number, since it uses less digits than its factorization.

221000012102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491654299.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221000012102221 its reverse (122201210000122), we get a palindrome (343201222102343).

The spelling of 221000012102221 in words is "two hundred twenty-one trillion, twelve million, one hundred two thousand, two hundred twenty-one".