201211144 has 8 divisors (see below), whose sum is σ = 377270910. Its totient is φ = 100605568.

The previous prime is 201211139. The next prime is 201211169. The reversal of 201211144 is 441112102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 198528100 + 2683044 = 14090^2 + 1638^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12575689 + ... + 12575704.

Almost surely, 2^201211144 is an apocalyptic number.

It is an amenable number.

201211144 is a deficient number, since it is larger than the sum of its proper divisors (176059766).

201211144 is a wasteful number, since it uses less digits than its factorization.

201211144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25151399 (or 25151395 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 201211144 is about 14184.8913989498. The cubic root of 201211144 is about 585.9816416106.

Adding to 201211144 its reverse (441112102), we get a palindrome (642323246).

The spelling of 201211144 in words is "two hundred one million, two hundred eleven thousand, one hundred forty-four".