211012021211 has 4 divisors (see below), whose sum is σ = 211024956912. Its totient is φ = 210999085512.

The previous prime is 211012021189. The next prime is 211012021217. The reversal of 211012021211 is 112120210112.

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-211012021211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211012021217) 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, 6443351 + ... + 6476016.

It is an arithmetic number, because the mean of its divisors is an integer number (52756239228).

Almost surely, 2^211012021211 is an apocalyptic number.

211012021211 is a deficient number, since it is larger than the sum of its proper divisors (12935701).

211012021211 is a wasteful number, since it uses less digits than its factorization.

211012021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12935700.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211012021211 its reverse (112120210112), we get a palindrome (323132231323).

The spelling of 211012021211 in words is "two hundred eleven billion, twelve million, twenty-one thousand, two hundred eleven".