20120122211 has 6 divisors (see below), whose sum is σ = 23405040180. Its totient is φ = 17245818996.

The previous prime is 20120122207. The next prime is 20120122223. The reversal of 20120122211 is 11222102102.

It is not a de Polignac number, because 20120122211 - 2² = 20120122207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120122241) 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 5 ways as a sum of consecutive naturals, for example, 205307321 + ... + 205307418.

It is an arithmetic number, because the mean of its divisors is an integer number (3900840030).

Almost surely, 2^20120122211 is an apocalyptic number.

20120122211 is a deficient number, since it is larger than the sum of its proper divisors (3284917969).

20120122211 is an equidigital number, since it uses as much as digits as its factorization.

20120122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410614753 (or 410614746 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20120122211 its reverse (11222102102), we get a palindrome (31342224313).

The spelling of 20120122211 in words is "twenty billion, one hundred twenty million, one hundred twenty-two thousand, two hundred eleven".