212120012011 has 4 divisors (see below), whose sum is σ = 212679695800. Its totient is φ = 211560328224.

The previous prime is 212120011967. The next prime is 212120012029. The reversal of 212120012011 is 110210021212.

212120012011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212120012011 - 2²¹ = 212117914859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212120011982 and 212120012000.

It is not an unprimeable number, because it can be changed into a prime (212120042011) 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 3 ways as a sum of consecutive naturals, for example, 279841326 + ... + 279842083.

It is an arithmetic number, because the mean of its divisors is an integer number (53169923950).

Almost surely, 2^212120012011 is an apocalyptic number.

212120012011 is a deficient number, since it is larger than the sum of its proper divisors (559683789).

212120012011 is an equidigital number, since it uses as much as digits as its factorization.

212120012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559683788.

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

Adding to 212120012011 its reverse (110210021212), we get a palindrome (322330033223).

The spelling of 212120012011 in words is "two hundred twelve billion, one hundred twenty million, twelve thousand, eleven".