10005042221 has 4 divisors (see below), whose sum is σ = 10056882012. Its totient is φ = 9953202432.

The previous prime is 10005042217. The next prime is 10005042259. The reversal of 10005042221 is 12224050001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12224050001 = 41 ⋅298147561.

It can be written as a sum of positive squares in 2 ways, for example, as 6693039721 + 3312002500 = 81811^2 + 57550^2 .

It is a cyclic number.

It is not a de Polignac number, because 10005042221 - 2² = 10005042217 is a prime.

It is a super-2 number, since 2×10005042221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10005042221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10005042721) 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, 25919606 + ... + 25919991.

It is an arithmetic number, because the mean of its divisors is an integer number (2514220503).

Almost surely, 2^10005042221 is an apocalyptic number.

It is an amenable number.

10005042221 is a deficient number, since it is larger than the sum of its proper divisors (51839791).

10005042221 is an equidigital number, since it uses as much as digits as its factorization.

10005042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51839790.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 10005042221 its reverse (12224050001), we get a palindrome (22229092222).

The spelling of 10005042221 in words is "ten billion, five million, forty-two thousand, two hundred twenty-one".