20411012552191 has 2 divisors, whose sum is σ = 20411012552192. Its totient is φ = 20411012552190.

The previous prime is 20411012552173. The next prime is 20411012552221. The reversal of 20411012552191 is 19125521011402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20411012552191 - 2⁵ = 20411012552159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20411012552891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10205506276095 + 10205506276096.

It is an arithmetic number, because the mean of its divisors is an integer number (10205506276096).

Almost surely, 2^{20411012552191} is an apocalyptic number.

20411012552191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20411012552191 is an equidigital number, since it uses as much as digits as its factorization.

20411012552191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 34.

Adding to 20411012552191 its reverse (19125521011402), we get a palindrome (39536533563593).

The spelling of 20411012552191 in words is "twenty trillion, four hundred eleven billion, twelve million, five hundred fifty-two thousand, one hundred ninety-one".