440135000021421 has 12 divisors (see below), whose sum is σ = 640391070592572. Its totient is φ = 291281557190976.

The previous prime is 440135000021401. The next prime is 440135000021441. The reversal of 440135000021421 is 124120000531044.

440135000021421 is a `hidden beast` number, since 4 + 4 + 0 + 13 + 500 + 0 + 0 + 2 + 142 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (440135000021401) and next prime (440135000021441).

It can be written as a sum of positive squares in 2 ways, for example, as 186065586423396 + 254069413598025 = 13640586^2 + 15939555^2 .

It is not a de Polignac number, because 440135000021421 - 2¹⁸ = 440134999759277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440135000021401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178481345086 + ... + 178481347551.

It is an arithmetic number, because the mean of its divisors is an integer number (53365922549381).

Almost surely, 2^{440135000021421} is an apocalyptic number.

It is an amenable number.

440135000021421 is a deficient number, since it is larger than the sum of its proper divisors (200256070571151).

440135000021421 is a wasteful number, since it uses less digits than its factorization.

440135000021421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356962692780 (or 356962692777 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 440135000021421 its reverse (124120000531044), we get a palindrome (564255000552465).

The spelling of 440135000021421 in words is "four hundred forty trillion, one hundred thirty-five billion, twenty-one thousand, four hundred twenty-one".