20001210191 has 2 divisors, whose sum is σ = 20001210192. Its totient is φ = 20001210190.

The previous prime is 20001210181. The next prime is 20001210239. The reversal of 20001210191 is 19101210002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001210191 - 2¹⁸ = 20000948047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001210101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000605095 + 10000605096.

It is an arithmetic number, because the mean of its divisors is an integer number (10000605096).

Almost surely, 2^20001210191 is an apocalyptic number.

20001210191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001210191 is an equidigital number, since it uses as much as digits as its factorization.

20001210191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 20001210191 its reverse (19101210002), we get a palindrome (39102420193).

The spelling of 20001210191 in words is "twenty billion, one million, two hundred ten thousand, one hundred ninety-one".