221242343441 has 16 divisors (see below), whose sum is σ = 258367174656. Its totient is φ = 185501552976.

The previous prime is 221242343437. The next prime is 221242343461. The reversal of 221242343441 is 144343242122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221242343441 - 2² = 221242343437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221242343398 and 221242343407.

It is not an unprimeable number, because it can be changed into a prime (221242343461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434150 + ... + 794336.

It is an arithmetic number, because the mean of its divisors is an integer number (16147948416).

Almost surely, 2^221242343441 is an apocalyptic number.

It is an amenable number.

221242343441 is a deficient number, since it is larger than the sum of its proper divisors (37124831215).

221242343441 is a wasteful number, since it uses less digits than its factorization.

221242343441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362108.

The product of its digits is 36864, while the sum is 32.

Adding to 221242343441 its reverse (144343242122), we get a palindrome (365585585563).

The spelling of 221242343441 in words is "two hundred twenty-one billion, two hundred forty-two million, three hundred forty-three thousand, four hundred forty-one".