20110211 has 16 divisors (see below), whose sum is σ = 23148288. Its totient is φ = 17292000.

The previous prime is 20110183. The next prime is 20110217. The reversal of 20110211 is 11201102.

It is a de Polignac number, because none of the positive numbers 2^k-20110211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20110217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25160 + ... + 25946.

It is an arithmetic number, because the mean of its divisors is an integer number (1446768).

Almost surely, 2^20110211 is an apocalyptic number.

20110211 is a deficient number, since it is larger than the sum of its proper divisors (3038077).

20110211 is a wasteful number, since it uses less digits than its factorization.

20110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 20110211 is about 4484.4409908036. The cubic root of 20110211 is about 271.9394464036.

Adding to 20110211 its reverse (11201102), we get a palindrome (31311313).

It can be divided in two parts, 201102 and 11, that multiplied together give a palindrome (2212122).

The spelling of 20110211 in words is "twenty million, one hundred ten thousand, two hundred eleven".