212020021211 has 4 divisors (see below), whose sum is σ = 212311658832. Its totient is φ = 211728383592.

The previous prime is 212020021159. The next prime is 212020021217. The reversal of 212020021211 is 112120020212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212020021211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212020021217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145817720 + ... + 145819173.

It is an arithmetic number, because the mean of its divisors is an integer number (53077914708).

Almost surely, 2^212020021211 is an apocalyptic number.

212020021211 is a deficient number, since it is larger than the sum of its proper divisors (291637621).

212020021211 is an equidigital number, since it uses as much as digits as its factorization.

212020021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291637620.

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

Adding to 212020021211 its reverse (112120020212), we get a palindrome (324140041423).

Subtracting from 212020021211 its reverse (112120020212), we obtain a palindrome (99900000999).

The spelling of 212020021211 in words is "two hundred twelve billion, twenty million, twenty-one thousand, two hundred eleven".