811120201 has 8 divisors (see below), whose sum is σ = 859981320. Its totient is φ = 762386688.

The previous prime is 811120129. The next prime is 811120229. The reversal of 811120201 is 102021118.

It can be written as a sum of positive squares in 4 ways, for example, as 498360976 + 312759225 = 22324^2 + 17685^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 811120201 - 2¹¹ = 811118153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (811120601) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18646 + ... + 44383.

It is an arithmetic number, because the mean of its divisors is an integer number (107497665).

Almost surely, 2^811120201 is an apocalyptic number.

It is an amenable number.

811120201 is a deficient number, since it is larger than the sum of its proper divisors (48861119).

811120201 is a wasteful number, since it uses less digits than its factorization.

811120201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63803.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 811120201 is about 28480.1720675982. The cubic root of 811120201 is about 932.5992729737.

Adding to 811120201 its reverse (102021118), we get a palindrome (913141319).

The spelling of 811120201 in words is "eight hundred eleven million, one hundred twenty thousand, two hundred one".