2044040042221 has 4 divisors (see below), whose sum is σ = 2052965981500. Its totient is φ = 2035114102944.

The previous prime is 2044040042189. The next prime is 2044040042237. The reversal of 2044040042221 is 1222400404402.

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 1326654758025 + 717385284196 = 1151805^2 + 846986^2 .

It is a cyclic number.

It is not a de Polignac number, because 2044040042221 - 2⁵ = 2044040042189 is a prime.

It is a super-2 number, since 2×2044040042221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2044040042251) 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, 4462969296 + ... + 4462969753.

It is an arithmetic number, because the mean of its divisors is an integer number (513241495375).

Almost surely, 2^{2044040042221} is an apocalyptic number.

It is an amenable number.

2044040042221 is a deficient number, since it is larger than the sum of its proper divisors (8925939279).

2044040042221 is an equidigital number, since it uses as much as digits as its factorization.

2044040042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8925939278.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 2044040042221 its reverse (1222400404402), we get a palindrome (3266440446623).

The spelling of 2044040042221 in words is "two trillion, forty-four billion, forty million, forty-two thousand, two hundred twenty-one".