221211100200121 has 8 divisors (see below), whose sum is σ = 222260918294304. Its totient is φ = 220161295542720.

The previous prime is 221211100200113. The next prime is 221211100200191. The reversal of 221211100200121 is 121002001112122.

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 221211100200121 - 2³ = 221211100200113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221211100200095 and 221211100200104.

It is not an unprimeable number, because it can be changed into a prime (221211100200191) 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, 30450666 + ... + 37008988.

It is an arithmetic number, because the mean of its divisors is an integer number (27782614786788).

Almost surely, 2^{221211100200121} is an apocalyptic number.

It is an amenable number.

221211100200121 is a deficient number, since it is larger than the sum of its proper divisors (1049818094183).

221211100200121 is a wasteful number, since it uses less digits than its factorization.

221211100200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718391.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221211100200121 its reverse (121002001112122), we get a palindrome (342213101312243).

The spelling of 221211100200121 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred million, two hundred thousand, one hundred twenty-one".