212111202111211 has 16 divisors (see below), whose sum is σ = 232300036926720. Its totient is φ = 192475620992160.

The previous prime is 212111202111191. The next prime is 212111202111251. The reversal of 212111202111211 is 112111202111212.

It is a cyclic number.

It is not a de Polignac number, because 212111202111211 - 2¹³ = 212111202103019 is a prime.

It is a super-2 number, since 2×212111202111211² (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 (212111202111251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285052906 + ... + 285796048.

It is an arithmetic number, because the mean of its divisors is an integer number (14518752307920).

Almost surely, 2^{212111202111211} is an apocalyptic number.

212111202111211 is a deficient number, since it is larger than the sum of its proper divisors (20188834815509).

212111202111211 is a wasteful number, since it uses less digits than its factorization.

212111202111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115346.

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

Adding to 212111202111211 its reverse (112111202111212), we get a palindrome (324222404222423).

Subtracting from 212111202111211 its reverse (112111202111212), we obtain a palindrome (99999999999999).

The spelling of 212111202111211 in words is "two hundred twelve trillion, one hundred eleven billion, two hundred two million, one hundred eleven thousand, two hundred eleven".