212020121211211 has 4 divisors (see below), whose sum is σ = 212023577803000. Its totient is φ = 212016664619424.

The previous prime is 212020121211179. The next prime is 212020121211257. The reversal of 212020121211211 is 112112121020212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 212020121211211 - 2⁵ = 212020121211179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212020121211271) 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, 1728203886 + ... + 1728326563.

It is an arithmetic number, because the mean of its divisors is an integer number (53005894450750).

Almost surely, 2^{212020121211211} is an apocalyptic number.

212020121211211 is a deficient number, since it is larger than the sum of its proper divisors (3456591789).

212020121211211 is an equidigital number, since it uses as much as digits as its factorization.

212020121211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456591788.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212020121211211 its reverse (112112121020212), we get a palindrome (324132242231423).

The spelling of 212020121211211 in words is "two hundred twelve trillion, twenty billion, one hundred twenty-one million, two hundred eleven thousand, two hundred eleven".