20031101191 has 2 divisors, whose sum is σ = 20031101192. Its totient is φ = 20031101190.

The previous prime is 20031101161. The next prime is 20031101261. The reversal of 20031101191 is 19110113002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20031101191 - 2¹³ = 20031092999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20031101161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015550595 + 10015550596.

It is an arithmetic number, because the mean of its divisors is an integer number (10015550596).

Almost surely, 2^20031101191 is an apocalyptic number.

20031101191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20031101191 is an equidigital number, since it uses as much as digits as its factorization.

20031101191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 20031101191 its reverse (19110113002), we get a palindrome (39141214193).

The spelling of 20031101191 in words is "twenty billion, thirty-one million, one hundred one thousand, one hundred ninety-one".