12444200021 has 8 divisors (see below), whose sum is σ = 13593062304. Its totient is φ = 11298266320.

The previous prime is 12444200003. The next prime is 12444200059. The reversal of 12444200021 is 12000244421.

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

It is not a de Polignac number, because 12444200021 - 2¹⁰ = 12444198997 is a prime.

It is a super-2 number, since 2×12444200021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12444199966 and 12444200002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12444200521) 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, 723251 + ... + 740256.

It is an arithmetic number, because the mean of its divisors is an integer number (1699132788).

Almost surely, 2^12444200021 is an apocalyptic number.

12444200021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12444200021 is a deficient number, since it is larger than the sum of its proper divisors (1148862283).

12444200021 is a wasteful number, since it uses less digits than its factorization.

12444200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464291.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 12444200021 its reverse (12000244421), we get a palindrome (24444444442).

The spelling of 12444200021 in words is "twelve billion, four hundred forty-four million, two hundred thousand, twenty-one".