221101101121 has 16 divisors (see below), whose sum is σ = 235345000000. Its totient is φ = 207125626176.

The previous prime is 221101101101. The next prime is 221101101127. The reversal of 221101101121 is 121101101122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221101101121 - 2³³ = 212511166529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221101101127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 926455 + ... + 1140403.

It is an arithmetic number, because the mean of its divisors is an integer number (14709062500).

Almost surely, 2^221101101121 is an apocalyptic number.

It is an amenable number.

221101101121 is a deficient number, since it is larger than the sum of its proper divisors (14243898879).

221101101121 is a wasteful number, since it uses less digits than its factorization.

221101101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214576.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221101101121 its reverse (121101101122), we get a palindrome (342202202243).

Subtracting from 221101101121 its reverse (121101101122), we obtain a palindrome (99999999999).

The spelling of 221101101121 in words is "two hundred twenty-one billion, one hundred one million, one hundred one thousand, one hundred twenty-one".