2244401021 has 4 divisors (see below), whose sum is σ = 2269619100. Its totient is φ = 2219182944.

The previous prime is 2244400937. The next prime is 2244401059. The reversal of 2244401021 is 1201044422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 937216996 + 1307184025 = 30614^2 + 36155^2 .

It is a cyclic number.

It is not a de Polignac number, because 2244401021 - 2¹⁸ = 2244138877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2244400984 and 2244401002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2244401221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12608906 + ... + 12609083.

It is an arithmetic number, because the mean of its divisors is an integer number (567404775).

Almost surely, 2^2244401021 is an apocalyptic number.

It is an amenable number.

2244401021 is a deficient number, since it is larger than the sum of its proper divisors (25218079).

2244401021 is an equidigital number, since it uses as much as digits as its factorization.

2244401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25218078.

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

The square root of 2244401021 is about 47375.1097201896. The cubic root of 2244401021 is about 1309.2828701255.

Adding to 2244401021 its reverse (1201044422), we get a palindrome (3445445443).

The spelling of 2244401021 in words is "two billion, two hundred forty-four million, four hundred one thousand, twenty-one".