440371020221 has 4 divisors (see below), whose sum is σ = 480404749344. Its totient is φ = 400337291100.

The previous prime is 440371020179. The next prime is 440371020251. The reversal of 440371020221 is 122020173044.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 440371020221 - 2⁶ = 440371020157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440371020251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20016864545 + ... + 20016864566.

It is an arithmetic number, because the mean of its divisors is an integer number (120101187336).

Almost surely, 2^440371020221 is an apocalyptic number.

It is an amenable number.

440371020221 is a deficient number, since it is larger than the sum of its proper divisors (40033729123).

440371020221 is a wasteful number, since it uses less digits than its factorization.

440371020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40033729122.

The product of its (nonzero) digits is 2688, while the sum is 26.

Adding to 440371020221 its reverse (122020173044), we get a palindrome (562391193265).

The spelling of 440371020221 in words is "four hundred forty billion, three hundred seventy-one million, twenty thousand, two hundred twenty-one".