212212021211 has 4 divisors (see below), whose sum is σ = 212215335192. Its totient is φ = 212208707232.

The previous prime is 212212021159. The next prime is 212212021261. The reversal of 212212021211 is 112120212212.

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 212212021211 - 2²² = 212207826907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212212021211.

It is not an unprimeable number, because it can be changed into a prime (212212021261) 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, 1559006 + ... + 1689651.

It is an arithmetic number, because the mean of its divisors is an integer number (53053833798).

Almost surely, 2^212212021211 is an apocalyptic number.

212212021211 is a deficient number, since it is larger than the sum of its proper divisors (3313981).

212212021211 is an equidigital number, since it uses as much as digits as its factorization.

212212021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3313980.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212212021211 its reverse (112120212212), we get a palindrome (324332233423).

The spelling of 212212021211 in words is "two hundred twelve billion, two hundred twelve million, twenty-one thousand, two hundred eleven".