221001022202221 has 8 divisors (see below), whose sum is σ = 223799438522880. Its totient is φ = 218202629257392.

The previous prime is 221001022202189. The next prime is 221001022202243. The reversal of 221001022202221 is 122202220100122.

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 221001022202221 - 2⁵ = 221001022202189 is a prime.

It is a super-3 number, since 3×221001022202221³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001022205221) 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, 13590891 + ... + 25034263.

It is an arithmetic number, because the mean of its divisors is an integer number (27974929815360).

Almost surely, 2^{221001022202221} is an apocalyptic number.

It is an amenable number.

221001022202221 is a deficient number, since it is larger than the sum of its proper divisors (2798416320659).

221001022202221 is a wasteful number, since it uses less digits than its factorization.

221001022202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11687915.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221001022202221 its reverse (122202220100122), we get a palindrome (343203242302343).

The spelling of 221001022202221 in words is "two hundred twenty-one trillion, one billion, twenty-two million, two hundred two thousand, two hundred twenty-one".