10000221020197 has 4 divisors (see below), whose sum is σ = 10345056227820. Its totient is φ = 9655385812576.

The previous prime is 10000221020189. The next prime is 10000221020269. The reversal of 10000221020197 is 79102012200001.

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 2131348887396 + 7868872132801 = 1459914^2 + 2805151^2 .

It is a cyclic number.

It is not a de Polignac number, because 10000221020197 - 2³ = 10000221020189 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 (10000221020297) 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 3 ways as a sum of consecutive naturals, for example, 172417603768 + ... + 172417603825.

It is an arithmetic number, because the mean of its divisors is an integer number (2586264056955).

Almost surely, 2^{10000221020197} is an apocalyptic number.

It is an amenable number.

10000221020197 is a deficient number, since it is larger than the sum of its proper divisors (344835207623).

10000221020197 is an equidigital number, since it uses as much as digits as its factorization.

10000221020197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344835207622.

The product of its (nonzero) digits is 504, while the sum is 25.

Adding to 10000221020197 its reverse (79102012200001), we get a palindrome (89102233220198).

The spelling of 10000221020197 in words is "ten trillion, two hundred twenty-one million, twenty thousand, one hundred ninety-seven".