12020121211 has 8 divisors (see below), whose sum is σ = 13757698784. Its totient is φ = 10287648000.

The previous prime is 12020121163. The next prime is 12020121227. The reversal of 12020121211 is 11212102021.

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

It is not a de Polignac number, because 12020121211 - 2¹⁷ = 12019990139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020121191 and 12020121200.

It is not an unprimeable number, because it can be changed into a prime (12020121511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1271040 + ... + 1280461.

It is an arithmetic number, because the mean of its divisors is an integer number (1719712348).

Almost surely, 2^12020121211 is an apocalyptic number.

12020121211 is a deficient number, since it is larger than the sum of its proper divisors (1737577573).

12020121211 is an equidigital number, since it uses as much as digits as its factorization.

12020121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552181.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12020121211 its reverse (11212102021), we get a palindrome (23232223232).

The spelling of 12020121211 in words is "twelve billion, twenty million, one hundred twenty-one thousand, two hundred eleven".