201121110891149 has 2 divisors, whose sum is σ = 201121110891150. Its totient is φ = 201121110891148.

The previous prime is 201121110891143. The next prime is 201121110891163. The reversal of 201121110891149 is 941198011121102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117299578623049 + 83821532268100 = 10830493^2 + 9155410^2 .

It is a cyclic number.

It is not a de Polignac number, because 201121110891149 - 2²⁰ = 201121109842573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201121110891143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560555445574 + 100560555445575.

It is an arithmetic number, because the mean of its divisors is an integer number (100560555445575).

Almost surely, 2^{201121110891149} is an apocalyptic number.

It is an amenable number.

201121110891149 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121110891149 is an equidigital number, since it uses as much as digits as its factorization.

201121110891149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 41.

The spelling of 201121110891149 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred ten million, eight hundred ninety-one thousand, one hundred forty-nine".