172021107207 has 8 divisors (see below), whose sum is σ = 229364387200. Its totient is φ = 114679282680.

The previous prime is 172021107199. The next prime is 172021107217. The reversal of 172021107207 is 702701120271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172021107207 - 2³ = 172021107199 is a prime.

It is a super-2 number, since 2×172021107207² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172021107217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49219 + ... + 588612.

It is an arithmetic number, because the mean of its divisors is an integer number (28670548400).

Almost surely, 2^172021107207 is an apocalyptic number.

172021107207 is a deficient number, since it is larger than the sum of its proper divisors (57343279993).

172021107207 is an equidigital number, since it uses as much as digits as its factorization.

172021107207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727733.

The product of its (nonzero) digits is 2744, while the sum is 30.

Adding to 172021107207 its reverse (702701120271), we get a palindrome (874722227478).

The spelling of 172021107207 in words is "one hundred seventy-two billion, twenty-one million, one hundred seven thousand, two hundred seven".