20124210191 has 2 divisors, whose sum is σ = 20124210192. Its totient is φ = 20124210190.

The previous prime is 20124210181. The next prime is 20124210229. The reversal of 20124210191 is 19101242102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20124210191 - 2¹⁰ = 20124209167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20124210151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062105095 + 10062105096.

It is an arithmetic number, because the mean of its divisors is an integer number (10062105096).

Almost surely, 2^20124210191 is an apocalyptic number.

20124210191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20124210191 is an equidigital number, since it uses as much as digits as its factorization.

20124210191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 20124210191 its reverse (19101242102), we get a palindrome (39225452293).

The spelling of 20124210191 in words is "twenty billion, one hundred twenty-four million, two hundred ten thousand, one hundred ninety-one".