20100211 has 8 divisors (see below), whose sum is σ = 20324304. Its totient is φ = 19877760.

The previous prime is 20100203. The next prime is 20100217. The reversal of 20100211 is 11200102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20100211 - 2³ = 20100203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100194 and 20100203.

It is not an unprimeable number, because it can be changed into a prime (20100217) 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 7 ways as a sum of consecutive naturals, for example, 65320 + ... + 65626.

It is an arithmetic number, because the mean of its divisors is an integer number (2540538).

Almost surely, 2^20100211 is an apocalyptic number.

20100211 is a deficient number, since it is larger than the sum of its proper divisors (224093).

20100211 is a wasteful number, since it uses less digits than its factorization.

20100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 20100211 is about 4483.3258859913. The cubic root of 20100211 is about 271.8943640764.

Adding to 20100211 its reverse (11200102), we get a palindrome (31300313).

The spelling of 20100211 in words is "twenty million, one hundred thousand, two hundred eleven".