20201310191 has 2 divisors, whose sum is σ = 20201310192. Its totient is φ = 20201310190.

The previous prime is 20201310179. The next prime is 20201310223. The reversal of 20201310191 is 19101310202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20201310191 - 2²⁶ = 20134201327 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201310791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100655095 + 10100655096.

It is an arithmetic number, because the mean of its divisors is an integer number (10100655096).

Almost surely, 2^20201310191 is an apocalyptic number.

20201310191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201310191 is an equidigital number, since it uses as much as digits as its factorization.

20201310191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 20201310191 its reverse (19101310202), we get a palindrome (39302620393).

The spelling of 20201310191 in words is "twenty billion, two hundred one million, three hundred ten thousand, one hundred ninety-one".