440422421221 has 4 divisors (see below), whose sum is σ = 440467103200. Its totient is φ = 440377739244.

The previous prime is 440422421207. The next prime is 440422421261. The reversal of 440422421221 is 122124224044.

It is a happy number.

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 440422421221 - 2⁷ = 440422421093 is a prime.

It is a super-2 number, since 2×440422421221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 440422421221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440422421261) 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, 22326201 + ... + 22345918.

It is an arithmetic number, because the mean of its divisors is an integer number (110116775800).

Almost surely, 2^440422421221 is an apocalyptic number.

It is an amenable number.

440422421221 is a deficient number, since it is larger than the sum of its proper divisors (44681979).

440422421221 is an equidigital number, since it uses as much as digits as its factorization.

440422421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44681978.

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 440422421221 its reverse (122124224044), we get a palindrome (562546645265).

The spelling of 440422421221 in words is "four hundred forty billion, four hundred twenty-two million, four hundred twenty-one thousand, two hundred twenty-one".