4044012221 has 4 divisors (see below), whose sum is σ = 4044714432. Its totient is φ = 4043310012.

The previous prime is 4044012179. The next prime is 4044012223. The reversal of 4044012221 is 1222104404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4044012221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4044012193 and 4044012202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4044012223) 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, 342395 + ... + 354008.

It is an arithmetic number, because the mean of its divisors is an integer number (1011178608).

Almost surely, 2^4044012221 is an apocalyptic number.

It is an amenable number.

4044012221 is a deficient number, since it is larger than the sum of its proper divisors (702211).

4044012221 is an equidigital number, since it uses as much as digits as its factorization.

4044012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702210.

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

The square root of 4044012221 is about 63592.5484707131. The cubic root of 4044012221 is about 1593.2019151261.

Adding to 4044012221 its reverse (1222104404), we get a palindrome (5266116625).

The spelling of 4044012221 in words is "four billion, forty-four million, twelve thousand, two hundred twenty-one".