221111000120121 has 8 divisors (see below), whose sum is σ = 294816356049600. Its totient is φ = 147406488802032.

The previous prime is 221111000120113. The next prime is 221111000120141. The reversal of 221111000120121 is 121021000111122.

It is a happy number.

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

It is not a de Polignac number, because 221111000120121 - 2³ = 221111000120113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221111000120121.

It is not an unprimeable number, because it can be changed into a prime (221111000120141) 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, 210541750 + ... + 211589343.

It is an arithmetic number, because the mean of its divisors is an integer number (36852044506200).

Almost surely, 2^{221111000120121} is an apocalyptic number.

It is an amenable number.

221111000120121 is a deficient number, since it is larger than the sum of its proper divisors (73705355929479).

221111000120121 is a wasteful number, since it uses less digits than its factorization.

221111000120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422305695.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221111000120121 its reverse (121021000111122), we get a palindrome (342132000231243).

The spelling of 221111000120121 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred twenty thousand, one hundred twenty-one".