211209000191 has 12 divisors (see below), whose sum is σ = 245750577480. Its totient is φ = 180993198960.

The previous prime is 211209000187. The next prime is 211209000193. The reversal of 211209000191 is 191000902112.

It is not a de Polignac number, because 211209000191 - 2² = 211209000187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211209000191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211209000193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 304100 + ... + 717561.

It is an arithmetic number, because the mean of its divisors is an integer number (20479214790).

Almost surely, 2^211209000191 is an apocalyptic number.

211209000191 is a deficient number, since it is larger than the sum of its proper divisors (34541577289).

211209000191 is a wasteful number, since it uses less digits than its factorization.

211209000191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025894 (or 1025887 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 211209000191 in words is "two hundred eleven billion, two hundred nine million, one hundred ninety-one", and thus it is an aban number.