201100985 has 4 divisors (see below), whose sum is σ = 241321188. Its totient is φ = 160880784.

The previous prime is 201100961. The next prime is 201101003. The reversal of 201100985 is 589001102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23785129 + 177315856 = 4877^2 + 13316^2 .

It is a cyclic number.

It is not a de Polignac number, because 201100985 - 2⁸ = 201100729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20110094 + ... + 20110103.

It is an arithmetic number, because the mean of its divisors is an integer number (60330297).

Almost surely, 2^201100985 is an apocalyptic number.

It is an amenable number.

201100985 is a deficient number, since it is larger than the sum of its proper divisors (40220203).

201100985 is an equidigital number, since it uses as much as digits as its factorization.

201100985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40220202.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 201100985 is about 14181.0078978893. The cubic root of 201100985 is about 585.8746844210.

The spelling of 201100985 in words is "two hundred one million, one hundred thousand, nine hundred eighty-five".