102201012191 has 4 divisors (see below), whose sum is σ = 102409161384. Its totient is φ = 101992863000.

The previous prime is 102201012163. The next prime is 102201012239. The reversal of 102201012191 is 191210102201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102201012191 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 (102201012101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104073860 + ... + 104074841.

It is an arithmetic number, because the mean of its divisors is an integer number (25602290346).

Almost surely, 2^102201012191 is an apocalyptic number.

102201012191 is a deficient number, since it is larger than the sum of its proper divisors (208149193).

102201012191 is an equidigital number, since it uses as much as digits as its factorization.

102201012191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208149192.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 102201012191 its reverse (191210102201), we get a palindrome (293411114392).

The spelling of 102201012191 in words is "one hundred two billion, two hundred one million, twelve thousand, one hundred ninety-one".