211212202201111 has 16 divisors (see below), whose sum is σ = 219556818803520. Its totient is φ = 203054881835520.

The previous prime is 211212202201093. The next prime is 211212202201157. The reversal of 211212202201111 is 111102202212112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211212202201111 - 2¹⁵ = 211212202168343 is a prime.

It is a super-2 number, since 2×211212202201111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212202201411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123351426 + ... + 125051983.

It is an arithmetic number, because the mean of its divisors is an integer number (13722301175220).

Almost surely, 2^{211212202201111} is an apocalyptic number.

211212202201111 is a deficient number, since it is larger than the sum of its proper divisors (8344616602409).

211212202201111 is a wasteful number, since it uses less digits than its factorization.

211212202201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248403786.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211212202201111 its reverse (111102202212112), we get a palindrome (322314404413223).

The spelling of 211212202201111 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred two million, two hundred one thousand, one hundred eleven".