221110121011121 has 8 divisors (see below), whose sum is σ = 232908344134080. Its totient is φ = 209327982721488.

The previous prime is 221110121011079. The next prime is 221110121011133. The reversal of 221110121011121 is 121110121011122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221110121011121 is a prime.

It is a super-2 number, since 2×221110121011121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221110121011121.

It is not an unprimeable number, because it can be changed into a prime (221110921011121) 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, 4021180106 + ... + 4021235091.

It is an arithmetic number, because the mean of its divisors is an integer number (29113543016760).

Almost surely, 2^{221110121011121} is an apocalyptic number.

It is an amenable number.

221110121011121 is a deficient number, since it is larger than the sum of its proper divisors (11798223122959).

221110121011121 is a wasteful number, since it uses less digits than its factorization.

221110121011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8042416663.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 221110121011121 its reverse (121110121011122), we get a palindrome (342220242022243).

Subtracting from 221110121011121 its reverse (121110121011122), we obtain a palindrome (99999999999999).

The spelling of 221110121011121 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred twenty-one million, eleven thousand, one hundred twenty-one".