201142211 has 4 divisors (see below), whose sum is σ = 203095152. Its totient is φ = 199189272.

The previous prime is 201142171. The next prime is 201142243. The reversal of 201142211 is 112241102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112241102 = 2 ⋅56120551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201142211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201142511) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 976316 + ... + 976521.

It is an arithmetic number, because the mean of its divisors is an integer number (50773788).

Almost surely, 2^201142211 is an apocalyptic number.

201142211 is a deficient number, since it is larger than the sum of its proper divisors (1952941).

201142211 is a wasteful number, since it uses less digits than its factorization.

201142211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952940.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 201142211 is about 14182.4613872205. The cubic root of 201142211 is about 585.9147167452.

Adding to 201142211 its reverse (112241102), we get a palindrome (313383313).

The spelling of 201142211 in words is "two hundred one million, one hundred forty-two thousand, two hundred eleven".