201011212121191 has 2 divisors, whose sum is σ = 201011212121192. Its totient is φ = 201011212121190.

The previous prime is 201011212121177. The next prime is 201011212121257. The reversal of 201011212121191 is 191121212110102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201011212121191 - 2⁹ = 201011212120679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201011212121141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100505606060595 + 100505606060596.

It is an arithmetic number, because the mean of its divisors is an integer number (100505606060596).

Almost surely, 2^{201011212121191} is an apocalyptic number.

201011212121191 is a deficient number, since it is larger than the sum of its proper divisors (1).

201011212121191 is an equidigital number, since it uses as much as digits as its factorization.

201011212121191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 25.

Adding to 201011212121191 its reverse (191121212110102), we get a palindrome (392132424231293).

The spelling of 201011212121191 in words is "two hundred one trillion, eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred ninety-one".