1044140221 has 4 divisors (see below), whose sum is σ = 1105560252. Its totient is φ = 982720192.

The previous prime is 1044140213. The next prime is 1044140239. The reversal of 1044140221 is 1220414401.

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 980316100 + 63824121 = 31310^2 + 7989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1044140221 - 2³ = 1044140213 is a prime.

It is a super-2 number, since 2×1044140221² = 2180457602219857682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1044140521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30709990 + ... + 30710023.

It is an arithmetic number, because the mean of its divisors is an integer number (276390063).

Almost surely, 2^1044140221 is an apocalyptic number.

It is an amenable number.

1044140221 is a deficient number, since it is larger than the sum of its proper divisors (61420031).

1044140221 is an equidigital number, since it uses as much as digits as its factorization.

1044140221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61420030.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1044140221 is about 32313.1586354538. The cubic root of 1044140221 is about 1014.5020800291.

Adding to 1044140221 its reverse (1220414401), we get a palindrome (2264554622).

The spelling of 1044140221 in words is "one billion, forty-four million, one hundred forty thousand, two hundred twenty-one".