221000222001121 has 8 divisors (see below), whose sum is σ = 228131030075904. Its totient is φ = 213869524467360.

The previous prime is 221000222001077. The next prime is 221000222001133. The reversal of 221000222001121 is 121100222000122.

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 221000222001121 - 2¹⁵ = 221000221968353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221000222001095 and 221000222001104.

It is not an unprimeable number, because it can be changed into a prime (221000222001721) 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, 23562700 + ... + 31578493.

It is an arithmetic number, because the mean of its divisors is an integer number (28516378759488).

Almost surely, 2^{221000222001121} is an apocalyptic number.

It is an amenable number.

221000222001121 is a deficient number, since it is larger than the sum of its proper divisors (7130808074783).

221000222001121 is a wasteful number, since it uses less digits than its factorization.

221000222001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55270511.

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

Adding to 221000222001121 its reverse (121100222000122), we get a palindrome (342100444001243).

Subtracting from 221000222001121 its reverse (121100222000122), we obtain a palindrome (99900000000999).

The spelling of 221000222001121 in words is "two hundred twenty-one trillion, two hundred twenty-two million, one thousand, one hundred twenty-one".