20001210180191 has 2 divisors, whose sum is σ = 20001210180192. Its totient is φ = 20001210180190.

The previous prime is 20001210180163. The next prime is 20001210180197. The reversal of 20001210180191 is 19108101210002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20001210180191 - 2³⁰ = 20000136438367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001210180191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001210180197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000605090095 + 10000605090096.

It is an arithmetic number, because the mean of its divisors is an integer number (10000605090096).

Almost surely, 2^{20001210180191} is an apocalyptic number.

20001210180191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001210180191 is an equidigital number, since it uses as much as digits as its factorization.

20001210180191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 26.

Adding to 20001210180191 its reverse (19108101210002), we get a palindrome (39109311390193).

The spelling of 20001210180191 in words is "twenty trillion, one billion, two hundred ten million, one hundred eighty thousand, one hundred ninety-one".