172021107200 has 60 divisors (see below), whose sum is σ = 426195763950. Its totient is φ = 68808437760.

The previous prime is 172021107199. The next prime is 172021107217. The reversal of 172021107200 is 2701120271.

It can be written as a sum of positive squares in 3 ways, for example, as 125565339904 + 46455767296 = 354352^2 + 215536^2 .

It is a super-2 number, since 2×172021107200² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6706775 + ... + 6732374.

Almost surely, 2^172021107200 is an apocalyptic number.

172021107200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172021107200 is an abundant number, since it is smaller than the sum of its proper divisors (254174656750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172021107200 is an equidigital number, since it uses as much as digits as its factorization.

172021107200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13439177 (or 13439156 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 23.

Adding to 172021107200 its reverse (2701120271), we get a palindrome (174722227471).

The spelling of 172021107200 in words is "one hundred seventy-two billion, twenty-one million, one hundred seven thousand, two hundred".