212101321211 has 16 divisors (see below), whose sum is σ = 228902016000. Its totient is φ = 195370278048.

The previous prime is 212101321199. The next prime is 212101321279. The reversal of 212101321211 is 112123101212.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212101321211 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 212101321211.

It is not an unprimeable number, because it can be changed into a prime (212101326211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19299260 + ... + 19310246.

It is an arithmetic number, because the mean of its divisors is an integer number (14306376000).

Almost surely, 2^212101321211 is an apocalyptic number.

212101321211 is a deficient number, since it is larger than the sum of its proper divisors (16800694789).

212101321211 is a wasteful number, since it uses less digits than its factorization.

212101321211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14018.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 212101321211 its reverse (112123101212), we get a palindrome (324224422423).

The spelling of 212101321211 in words is "two hundred twelve billion, one hundred one million, three hundred twenty-one thousand, two hundred eleven".