201121110000091 has 2 divisors, whose sum is σ = 201121110000092. Its totient is φ = 201121110000090.

The previous prime is 201121110000077. The next prime is 201121110000119. The reversal of 201121110000091 is 190000011121102.

201121110000091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201121110000091 - 2³⁷ = 200983671046619 is a prime.

It is not a weakly prime, because it can be changed into another prime (201121110007091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560555000045 + 100560555000046.

It is an arithmetic number, because the mean of its divisors is an integer number (100560555000046).

Almost surely, 2^{201121110000091} is an apocalyptic number.

201121110000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121110000091 is an equidigital number, since it uses as much as digits as its factorization.

201121110000091 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 19.

Adding to 201121110000091 its reverse (190000011121102), we get a palindrome (391121121121193).

The spelling of 201121110000091 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred ten million, ninety-one", and thus it is an aban number.