20010200120191 has 2 divisors, whose sum is σ = 20010200120192. Its totient is φ = 20010200120190.

The previous prime is 20010200120093. The next prime is 20010200120243. The reversal of 20010200120191 is 19102100201002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20010200120191 - 2⁷ = 20010200120063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010200120791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005100060095 + 10005100060096.

It is an arithmetic number, because the mean of its divisors is an integer number (10005100060096).

Almost surely, 2^{20010200120191} is an apocalyptic number.

20010200120191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010200120191 is an equidigital number, since it uses as much as digits as its factorization.

20010200120191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 20010200120191 its reverse (19102100201002), we get a palindrome (39112300321193).

The spelling of 20010200120191 in words is "twenty trillion, ten billion, two hundred million, one hundred twenty thousand, one hundred ninety-one".