212102100191 has 8 divisors (see below), whose sum is σ = 212618502000. Its totient is φ = 211586064768.

The previous prime is 212102100163. The next prime is 212102100211. The reversal of 212102100191 is 191001201212.

212102100191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212102100191 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 (212102100491) 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 in 7 ways as a sum of consecutive naturals, for example, 1085975 + ... + 1266311.

It is an arithmetic number, because the mean of its divisors is an integer number (26577312750).

Almost surely, 2^212102100191 is an apocalyptic number.

212102100191 is a deficient number, since it is larger than the sum of its proper divisors (516401809).

212102100191 is a wasteful number, since it uses less digits than its factorization.

212102100191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183193.

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

The spelling of 212102100191 in words is "two hundred twelve billion, one hundred two million, one hundred thousand, one hundred ninety-one".