21444120422245 has 8 divisors (see below), whose sum is σ = 25833072696984. Its totient is φ = 17088544210944.

The previous prime is 21444120422191. The next prime is 21444120422299. The reversal of 21444120422245 is 54222402144412.

It is an interprime number because it is at equal distance from previous prime (21444120422191) and next prime (21444120422299).

It can be written as a sum of positive squares in 4 ways, for example, as 2568910139524 + 18875210282721 = 1602782^2 + 4344561^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21444120422245 - 2¹³ = 21444120414053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8344014444 + ... + 8344017013.

It is an arithmetic number, because the mean of its divisors is an integer number (3229134087123).

Almost surely, 2^{21444120422245} is an apocalyptic number.

It is an amenable number.

21444120422245 is a deficient number, since it is larger than the sum of its proper divisors (4388952274739).

21444120422245 is a wasteful number, since it uses less digits than its factorization.

21444120422245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16688031719.

The product of its (nonzero) digits is 163840, while the sum is 37.

Adding to 21444120422245 its reverse (54222402144412), we get a palindrome (75666522566657).

The spelling of 21444120422245 in words is "twenty-one trillion, four hundred forty-four billion, one hundred twenty million, four hundred twenty-two thousand, two hundred forty-five".