221201120021101 has 24 divisors (see below), whose sum is σ = 241980533676000. Its totient is φ = 200534941536000.

The previous prime is 221201120021093. The next prime is 221201120021113. The reversal of 221201120021101 is 101120021102122.

It is not a de Polignac number, because 221201120021101 - 2³ = 221201120021093 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 (221201120027101) 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, 7250341035 + ... + 7250371543.

It is an arithmetic number, because the mean of its divisors is an integer number (10082522236500).

Almost surely, 2^{221201120021101} is an apocalyptic number.

It is an amenable number.

221201120021101 is a deficient number, since it is larger than the sum of its proper divisors (20779413654899).

221201120021101 is an equidigital number, since it uses as much as digits as its factorization.

221201120021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35421 (or 35020 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221201120021101 its reverse (101120021102122), we get a palindrome (322321141123223).

The spelling of 221201120021101 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred twenty million, twenty-one thousand, one hundred one".