201021092 has 12 divisors (see below), whose sum is σ = 351936816. Its totient is φ = 100467720.

The previous prime is 201021091. The next prime is 201021101. The reversal of 201021092 is 290120102.

It is a self number, because there is not a number n which added to its sum of digits gives 201021092.

It is not an unprimeable number, because it can be changed into a prime (201021091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1367 + ... + 20097.

It is an arithmetic number, because the mean of its divisors is an integer number (29328068).

Almost surely, 2^201021092 is an apocalyptic number.

It is an amenable number.

201021092 is a deficient number, since it is larger than the sum of its proper divisors (150915724).

201021092 is a wasteful number, since it uses less digits than its factorization.

201021092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21418 (or 21416 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 201021092 is about 14178.1907167311. The cubic root of 201021092 is about 585.7970891007.

Adding to 201021092 its reverse (290120102), we get a palindrome (491141194).

The spelling of 201021092 in words is "two hundred one million, twenty-one thousand, ninety-two".