20120111211 has 4 divisors (see below), whose sum is σ = 26826814952. Its totient is φ = 13413407472.

The previous prime is 20120111197. The next prime is 20120111213. The reversal of 20120111211 is 11211102102.

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

It is not a de Polignac number, because 20120111211 - 2⁷ = 20120111083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120111213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353351866 + ... + 3353351871.

It is an arithmetic number, because the mean of its divisors is an integer number (6706703738).

Almost surely, 2^20120111211 is an apocalyptic number.

20120111211 is a deficient number, since it is larger than the sum of its proper divisors (6706703741).

20120111211 is an equidigital number, since it uses as much as digits as its factorization.

20120111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6706703740.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20120111211 its reverse (11211102102), we get a palindrome (31331213313).

The spelling of 20120111211 in words is "twenty billion, one hundred twenty million, one hundred eleven thousand, two hundred eleven".