10020000100221 has 20 divisors (see below), whose sum is σ = 15136329750300. Its totient is φ = 6604943881536.

The previous prime is 10020000100211. The next prime is 10020000100223. The reversal of 10020000100221 is 12200100002001.

It can be written as a sum of positive squares in 2 ways, for example, as 2298298448196 + 7721701652025 = 1516014^2 + 2778795^2 .

It is not a de Polignac number, because 10020000100221 - 2¹³ = 10020000092029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020000100223) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 694957426 + ... + 694971843.

It is an arithmetic number, because the mean of its divisors is an integer number (756816487515).

Almost surely, 2^{10020000100221} is an apocalyptic number.

It is an amenable number.

10020000100221 is a deficient number, since it is larger than the sum of its proper divisors (5116329650079).

10020000100221 is an equidigital number, since it uses as much as digits as its factorization.

10020000100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389929370 (or 1389929361 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10020000100221 its reverse (12200100002001), we get a palindrome (22220100102222).

The spelling of 10020000100221 in words is "ten trillion, twenty billion, one hundred thousand, two hundred twenty-one".