221200021220101 has 24 divisors (see below), whose sum is σ = 283485792984480. Its totient is φ = 170657082036000.

The previous prime is 221200021220063. The next prime is 221200021220119. The reversal of 221200021220101 is 101022120002122.

It is a happy number.

It is not a de Polignac number, because 221200021220101 - 2¹³ = 221200021211909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200021226101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2031577491 + ... + 2031686368.

It is an arithmetic number, because the mean of its divisors is an integer number (11811908041020).

Almost surely, 2^{221200021220101} is an apocalyptic number.

It is an amenable number.

221200021220101 is a deficient number, since it is larger than the sum of its proper divisors (62285771764379).

221200021220101 is a wasteful number, since it uses less digits than its factorization.

221200021220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4063263985 (or 4063263978 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221200021220101 its reverse (101022120002122), we get a palindrome (322222141222223).

The spelling of 221200021220101 in words is "two hundred twenty-one trillion, two hundred billion, twenty-one million, two hundred twenty thousand, one hundred one".