221241104101 has 4 divisors (see below), whose sum is σ = 223198990092. Its totient is φ = 219283218112.

The previous prime is 221241104089. The next prime is 221241104111. The reversal of 221241104101 is 101401142122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53083699201 + 168157404900 = 230399^2 + 410070^2 .

It is a cyclic number.

It is not a de Polignac number, because 221241104101 - 2⁵ = 221241104069 is a prime.

It is a super-2 number, since 2×221241104101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221241104111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 978942826 + ... + 978943051.

It is an arithmetic number, because the mean of its divisors is an integer number (55799747523).

Almost surely, 2^221241104101 is an apocalyptic number.

It is an amenable number.

221241104101 is a deficient number, since it is larger than the sum of its proper divisors (1957885991).

221241104101 is a wasteful number, since it uses less digits than its factorization.

221241104101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957885990.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221241104101 its reverse (101401142122), we get a palindrome (322642246223).

The spelling of 221241104101 in words is "two hundred twenty-one billion, two hundred forty-one million, one hundred four thousand, one hundred one".