221011020110121 has 8 divisors (see below), whose sum is σ = 294687592098624. Its totient is φ = 147337564097520.

The previous prime is 221011020110113. The next prime is 221011020110189. The reversal of 221011020110121 is 121011020110122.

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 221011020110121 - 2³ = 221011020110113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221011020110121.

It is not an unprimeable number, because it can be changed into a prime (221011020110921) 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, 778828470 + ... + 779112191.

It is an arithmetic number, because the mean of its divisors is an integer number (36835949012328).

Almost surely, 2^{221011020110121} is an apocalyptic number.

It is an amenable number.

221011020110121 is a deficient number, since it is larger than the sum of its proper divisors (73676571988503).

221011020110121 is a wasteful number, since it uses less digits than its factorization.

221011020110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557987951.

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

Adding to 221011020110121 its reverse (121011020110122), we get a palindrome (342022040220243).

Subtracting from 221011020110121 its reverse (121011020110122), we obtain a palindrome (99999999999999).

The spelling of 221011020110121 in words is "two hundred twenty-one trillion, eleven billion, twenty million, one hundred ten thousand, one hundred twenty-one".