221242043101 has 8 divisors (see below), whose sum is σ = 228908849400. Its totient is φ = 213577754880.

The previous prime is 221242043053. The next prime is 221242043119. The reversal of 221242043101 is 101340242122.

It can be written as a sum of positive squares in 4 ways, for example, as 11262727876 + 209979315225 = 106126^2 + 458235^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 221242043101 - 2¹⁷ = 221241912029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221242046101) 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, 449880 + ... + 803041.

It is an arithmetic number, because the mean of its divisors is an integer number (28613606175).

Almost surely, 2^221242043101 is an apocalyptic number.

It is an amenable number.

221242043101 is a deficient number, since it is larger than the sum of its proper divisors (7666806299).

221242043101 is a wasteful number, since it uses less digits than its factorization.

221242043101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259039.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221242043101 its reverse (101340242122), we get a palindrome (322582285223).

The spelling of 221242043101 in words is "two hundred twenty-one billion, two hundred forty-two million, forty-three thousand, one hundred one".