440121240221 has 8 divisors (see below), whose sum is σ = 474078084480. Its totient is φ = 406178876592.

The previous prime is 440121240109. The next prime is 440121240227. The reversal of 440121240221 is 122042121044.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440121240221 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440121240227) 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, 3556985 + ... + 3678638.

It is an arithmetic number, because the mean of its divisors is an integer number (59259760560).

Almost surely, 2^440121240221 is an apocalyptic number.

It is an amenable number.

440121240221 is a deficient number, since it is larger than the sum of its proper divisors (33956844259).

440121240221 is a wasteful number, since it uses less digits than its factorization.

440121240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7240315.

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

Adding to 440121240221 its reverse (122042121044), we get a palindrome (562163361265).

The spelling of 440121240221 in words is "four hundred forty billion, one hundred twenty-one million, two hundred forty thousand, two hundred twenty-one".