221100120121 has 8 divisors (see below), whose sum is σ = 223140209600. Its totient is φ = 219060242640.

The previous prime is 221100120097. The next prime is 221100120149. The reversal of 221100120121 is 121021001122.

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 221100120121 - 2¹⁵ = 221100087353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221100120161) 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, 2696710 + ... + 2777488.

It is an arithmetic number, because the mean of its divisors is an integer number (27892526200).

Almost surely, 2^221100120121 is an apocalyptic number.

It is an amenable number.

221100120121 is a deficient number, since it is larger than the sum of its proper divisors (2040089479).

221100120121 is a wasteful number, since it uses less digits than its factorization.

221100120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105999.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221100120121 its reverse (121021001122), we get a palindrome (342121121243).

The spelling of 221100120121 in words is "two hundred twenty-one billion, one hundred million, one hundred twenty thousand, one hundred twenty-one".