11800221171025 has 63 divisors (see below), whose sum is σ = 17079492852571. Its totient is φ = 8087540501040.

The previous prime is 11800221170939. The next prime is 11800221171029. The reversal of 11800221171025 is 52017112200811.

The square root of 11800221171025 is 3435145.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4248079621569 + 7552141549456 = 2061087^2 + 2748116^2 .

It is not a de Polignac number, because 11800221171025 - 2²¹ = 11800219073873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11800221171029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 5891272674 + ... + 5891274676.

Almost surely, 2^{11800221171025} is an apocalyptic number.

11800221171025 is the 3435145-th square number.

11800221171025 is the 1717573-rd centered octagonal number.

It is an amenable number.

11800221171025 is a deficient number, since it is larger than the sum of its proper divisors (5279271681546).

11800221171025 is an frugal number, since it uses more digits than its factorization.

11800221171025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4058 (or 2015 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 31.

Adding to 11800221171025 its reverse (52017112200811), we get a palindrome (63817333371836).

The spelling of 11800221171025 in words is "eleven trillion, eight hundred billion, two hundred twenty-one million, one hundred seventy-one thousand, twenty-five".