172021107199 has 2 divisors, whose sum is σ = 172021107200. Its totient is φ = 172021107198.

The previous prime is 172021107197. The next prime is 172021107217. The reversal of 172021107199 is 991701120271.

172021107199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172021107199 - 2¹ = 172021107197 is a prime.

It is a super-2 number, since 2×172021107199² (a number of 23 digits) contains 22 as substring.

Together with 172021107197, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172021107197) 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 as a sum of consecutive naturals, namely, 86010553599 + 86010553600.

It is an arithmetic number, because the mean of its divisors is an integer number (86010553600).

Almost surely, 2^172021107199 is an apocalyptic number.

172021107199 is a deficient number, since it is larger than the sum of its proper divisors (1).

172021107199 is an equidigital number, since it uses as much as digits as its factorization.

172021107199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 40.

The spelling of 172021107199 in words is "one hundred seventy-two billion, twenty-one million, one hundred seven thousand, one hundred ninety-nine".