211211211201211 has 16 divisors (see below), whose sum is σ = 231188253976960. Its totient is φ = 191767062625920.

The previous prime is 211211211201197. The next prime is 211211211201227. The reversal of 211211211201211 is 112102112112112.

It is a cyclic number.

It is not a de Polignac number, because 211211211201211 - 2⁹ = 211211211200699 is a prime.

It is a super-2 number, since 2×211211211201211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211211211201511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182192041 + ... + 183347653.

It is an arithmetic number, because the mean of its divisors is an integer number (14449265873560).

Almost surely, 2^{211211211201211} is an apocalyptic number.

211211211201211 is a deficient number, since it is larger than the sum of its proper divisors (19977042775749).

211211211201211 is a wasteful number, since it uses less digits than its factorization.

211211211201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386166.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 211211211201211 its reverse (112102112112112), we get a palindrome (323313323313323).

The spelling of 211211211201211 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred eleven million, two hundred one thousand, two hundred eleven".