1000040221 has 8 divisors (see below), whose sum is σ = 1012933880. Its totient is φ = 987199488.

The previous prime is 1000040203. The next prime is 1000040257. The reversal of 1000040221 is 1220400001.

It can be written as a sum of positive squares in 4 ways, for example, as 70644025 + 929396196 = 8405^2 + 30486^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1000040221 - 2¹³ = 1000032029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000040198 and 1000040207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000040201) 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 7 ways as a sum of consecutive naturals, for example, 25525 + ... + 51493.

It is an arithmetic number, because the mean of its divisors is an integer number (126616735).

Almost surely, 2^1000040221 is an apocalyptic number.

It is an amenable number.

1000040221 is a deficient number, since it is larger than the sum of its proper divisors (12893659).

1000040221 is an equidigital number, since it uses as much as digits as its factorization.

1000040221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26463.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1000040221 is about 31623.4125451381. The cubic root of 1000040221 is about 1000.0134068203.

Adding to 1000040221 its reverse (1220400001), we get a palindrome (2220440222).

The spelling of 1000040221 in words is "one billion, forty thousand, two hundred twenty-one".