212211000191 has 2 divisors, whose sum is σ = 212211000192. Its totient is φ = 212211000190.

The previous prime is 212211000179. The next prime is 212211000257. The reversal of 212211000191 is 191000112212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212211000191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212211000101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105500095 + 106105500096.

It is an arithmetic number, because the mean of its divisors is an integer number (106105500096).

Almost surely, 2^212211000191 is an apocalyptic number.

212211000191 is a deficient number, since it is larger than the sum of its proper divisors (1).

212211000191 is an equidigital number, since it uses as much as digits as its factorization.

212211000191 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 212211000191 in words is "two hundred twelve billion, two hundred eleven million, one hundred ninety-one", and thus it is an aban number.