211202221212111 has 16 divisors (see below), whose sum is σ = 282075492048768. Its totient is φ = 140565399535200.

The previous prime is 211202221212109. The next prime is 211202221212133. The reversal of 211202221212111 is 111212122202112.

It is not a de Polignac number, because 211202221212111 - 2¹ = 211202221212109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211202221212011) 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, 18398625 + ... + 27584666.

It is an arithmetic number, because the mean of its divisors is an integer number (17629718253048).

Almost surely, 2^{211202221212111} is an apocalyptic number.

211202221212111 is a deficient number, since it is larger than the sum of its proper divisors (70873270836657).

211202221212111 is a wasteful number, since it uses less digits than its factorization.

211202221212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45985862.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 211202221212111 its reverse (111212122202112), we get a palindrome (322414343414223).

Subtracting from 211202221212111 its reverse (111212122202112), we obtain a palindrome (99990099009999).

The spelling of 211202221212111 in words is "two hundred eleven trillion, two hundred two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred eleven".