201101211 has 40 divisors (see below), whose sum is σ = 319922064. Its totient is φ = 125971200.

The previous prime is 201101209. The next prime is 201101231. The reversal of 201101211 is 112101102.

It is a happy number.

It is not a de Polignac number, because 201101211 - 2¹ = 201101209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 201101193 and 201101202.

It is not an unprimeable number, because it can be changed into a prime (201101231) 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 39 ways as a sum of consecutive naturals, for example, 334311 + ... + 334911.

Almost surely, 2^201101211 is an apocalyptic number.

201101211 is a deficient number, since it is larger than the sum of its proper divisors (118820853).

201101211 is an frugal number, since it uses more digits than its factorization.

201101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 201101211 is about 14181.0158662911. The cubic root of 201101211 is about 585.8749038923.

Adding to 201101211 its reverse (112101102), we get a palindrome (313202313).

It can be divided in two parts, 20110 and 1211, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 201101211 in words is "two hundred one million, one hundred one thousand, two hundred eleven".