221440404101 has 8 divisors (see below), whose sum is σ = 256639181184. Its totient is φ = 187132735440.

The previous prime is 221440404061. The next prime is 221440404103. The reversal of 221440404101 is 101404044122.

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

It is not a de Polignac number, because 221440404101 - 2⁶ = 221440404037 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 (221440404103) 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, 222776570 + ... + 222777563.

It is an arithmetic number, because the mean of its divisors is an integer number (32079897648).

Almost surely, 2^221440404101 is an apocalyptic number.

It is an amenable number.

221440404101 is a deficient number, since it is larger than the sum of its proper divisors (35198777083).

221440404101 is an equidigital number, since it uses as much as digits as its factorization.

221440404101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445554211.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221440404101 its reverse (101404044122), we get a palindrome (322844448223).

The spelling of 221440404101 in words is "two hundred twenty-one billion, four hundred forty million, four hundred four thousand, one hundred one".