221102221112121 has 8 divisors (see below), whose sum is σ = 302770609090624. Its totient is φ = 143417656937520.

The previous prime is 221102221112117. The next prime is 221102221112147. The reversal of 221102221112121 is 121211122201122.

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

It is not a de Polignac number, because 221102221112121 - 2² = 221102221112117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221102221113121) 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, 995955950845 + ... + 995955951066.

It is an arithmetic number, because the mean of its divisors is an integer number (37846326136328).

Almost surely, 2^{221102221112121} is an apocalyptic number.

It is an amenable number.

221102221112121 is a deficient number, since it is larger than the sum of its proper divisors (81668387978503).

221102221112121 is a wasteful number, since it uses less digits than its factorization.

221102221112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991911901951.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221102221112121 its reverse (121211122201122), we get a palindrome (342313343313243).

The spelling of 221102221112121 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred twenty-one million, one hundred twelve thousand, one hundred twenty-one".