201144122 has 4 divisors (see below), whose sum is σ = 301716186. Its totient is φ = 100572060.

The previous prime is 201144113. The next prime is 201144137. The reversal of 201144122 is 221441102.

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

It can be written as a sum of positive squares in only one way, i.e., 161315401 + 39828721 = 12701^2 + 6311^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 201144122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50286029 + ... + 50286032.

Almost surely, 2^201144122 is an apocalyptic number.

201144122 is a deficient number, since it is larger than the sum of its proper divisors (100572064).

201144122 is a wasteful number, since it uses less digits than its factorization.

201144122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100572063.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 201144122 is about 14182.5287590049. The cubic root of 201144122 is about 585.9165722806.

Adding to 201144122 its reverse (221441102), we get a palindrome (422585224).

The spelling of 201144122 in words is "two hundred one million, one hundred forty-four thousand, one hundred twenty-two".