201081105 has 12 divisors (see below), whose sum is σ = 348540660. Its totient is φ = 107243232.

The previous prime is 201081091. The next prime is 201081131. The reversal of 201081105 is 501180102.

It can be written as a sum of positive squares in 2 ways, for example, as 96059601 + 105021504 = 9801^2 + 10248^2 .

It is not a de Polignac number, because 201081105 - 2⁵ = 201081073 is a prime.

It is a super-2 number, since 2×201081105² = 80867221576042050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2234190 + ... + 2234279.

It is an arithmetic number, because the mean of its divisors is an integer number (29045055).

Almost surely, 2^201081105 is an apocalyptic number.

It is an amenable number.

201081105 is a deficient number, since it is larger than the sum of its proper divisors (147459555).

201081105 is a wasteful number, since it uses less digits than its factorization.

201081105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4468480 (or 4468477 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 201081105 is about 14180.3069430813. The cubic root of 201081105 is about 585.8553780801.

The spelling of 201081105 in words is "two hundred one million, eighty-one thousand, one hundred five".