4044400121 has 4 divisors (see below), whose sum is σ = 4048699044. Its totient is φ = 4040101200.

The previous prime is 4044400057. The next prime is 4044400133. The reversal of 4044400121 is 1210044404.

It is a happy number.

4044400121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3176449600 + 867950521 = 56360^2 + 29461^2 .

It is a cyclic number.

It is not a de Polignac number, because 4044400121 - 2⁶ = 4044400057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4044400093 and 4044400102.

It is not an unprimeable number, because it can be changed into a prime (4044400141) 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, 2148050 + ... + 2149931.

It is an arithmetic number, because the mean of its divisors is an integer number (1012174761).

Almost surely, 2^4044400121 is an apocalyptic number.

It is an amenable number.

4044400121 is a deficient number, since it is larger than the sum of its proper divisors (4298923).

4044400121 is an equidigital number, since it uses as much as digits as its factorization.

4044400121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4298922.

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

The square root of 4044400121 is about 63595.5982832145. The cubic root of 4044400121 is about 1593.2528532564.

Adding to 4044400121 its reverse (1210044404), we get a palindrome (5254444525).

The spelling of 4044400121 in words is "four billion, forty-four million, four hundred thousand, one hundred twenty-one".