20125206191 has 2 divisors, whose sum is σ = 20125206192. Its totient is φ = 20125206190.

The previous prime is 20125206131. The next prime is 20125206229. The reversal of 20125206191 is 19160252102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20125206191 - 2¹⁴ = 20125189807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20125206131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062603095 + 10062603096.

It is an arithmetic number, because the mean of its divisors is an integer number (10062603096).

Almost surely, 2^20125206191 is an apocalyptic number.

20125206191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20125206191 is an equidigital number, since it uses as much as digits as its factorization.

20125206191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

Adding to 20125206191 its reverse (19160252102), we get a palindrome (39285458293).

The spelling of 20125206191 in words is "twenty billion, one hundred twenty-five million, two hundred six thousand, one hundred ninety-one".