201121001022091 has 2 divisors, whose sum is σ = 201121001022092. Its totient is φ = 201121001022090.

The previous prime is 201121001021987. The next prime is 201121001022143. The reversal of 201121001022091 is 190220100121102.

201121001022091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201121001022091 is a prime.

It is not a weakly prime, because it can be changed into another prime (201121001022191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560500511045 + 100560500511046.

It is an arithmetic number, because the mean of its divisors is an integer number (100560500511046).

Almost surely, 2^{201121001022091} is an apocalyptic number.

201121001022091 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121001022091 is an equidigital number, since it uses as much as digits as its factorization.

201121001022091 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 22.

Adding to 201121001022091 its reverse (190220100121102), we get a palindrome (391341101143193).

The spelling of 201121001022091 in words is "two hundred one trillion, one hundred twenty-one billion, one million, twenty-two thousand, ninety-one".