12020111211 has 16 divisors (see below), whose sum is σ = 16448382720. Its totient is φ = 7805343840.

The previous prime is 12020111177. The next prime is 12020111249. The reversal of 12020111211 is 11211102021.

It is not a de Polignac number, because 12020111211 - 2¹⁰ = 12020110187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12020111261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322276 + ... + 357633.

It is an arithmetic number, because the mean of its divisors is an integer number (1028023920).

Almost surely, 2^12020111211 is an apocalyptic number.

12020111211 is a deficient number, since it is larger than the sum of its proper divisors (4428271509).

12020111211 is an equidigital number, since it uses as much as digits as its factorization.

12020111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680066.

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

Adding to 12020111211 its reverse (11211102021), we get a palindrome (23231213232).

The spelling of 12020111211 in words is "twelve billion, twenty million, one hundred eleven thousand, two hundred eleven".