20011210211 has 4 divisors (see below), whose sum is σ = 20114895432. Its totient is φ = 19907524992.

The previous prime is 20011210189. The next prime is 20011210213. The reversal of 20011210211 is 11201211002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011210211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011210192 and 20011210201.

It is not an unprimeable number, because it can be changed into a prime (20011210213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51842321 + ... + 51842706.

It is an arithmetic number, because the mean of its divisors is an integer number (5028723858).

Almost surely, 2^20011210211 is an apocalyptic number.

20011210211 is a deficient number, since it is larger than the sum of its proper divisors (103685221).

20011210211 is a wasteful number, since it uses less digits than its factorization.

20011210211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103685220.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20011210211 its reverse (11201211002), we get a palindrome (31212421213).

The spelling of 20011210211 in words is "twenty billion, eleven million, two hundred ten thousand, two hundred eleven".