10010000221 has 4 divisors (see below), whose sum is σ = 10780000252. Its totient is φ = 9240000192.

The previous prime is 10010000183. The next prime is 10010000251. The reversal of 10010000221 is 12200001001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12200001001 = 173 ⋅70520237.

It can be written as a sum of positive squares in 2 ways, for example, as 2341495321 + 7668504900 = 48389^2 + 87570^2 .

It is a cyclic number.

It is not a de Polignac number, because 10010000221 - 2¹⁵ = 10009967453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10010000251) 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, 384999996 + ... + 385000021.

It is an arithmetic number, because the mean of its divisors is an integer number (2695000063).

Almost surely, 2^10010000221 is an apocalyptic number.

It is an amenable number.

10010000221 is a deficient number, since it is larger than the sum of its proper divisors (770000031).

10010000221 is an equidigital number, since it uses as much as digits as its factorization.

10010000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770000030.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 10010000221 its reverse (12200001001), we get a palindrome (22210001222).

The spelling of 10010000221 in words is "ten billion, ten million, two hundred twenty-one", and thus it is an aban number.