212101001111111 has 8 divisors (see below), whose sum is σ = 242550866897280. Its totient is φ = 181688566017528.

The previous prime is 212101001111107. The next prime is 212101001111137. The reversal of 212101001111111 is 111111100101212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212101001111111 - 2² = 212101001111107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212101001111171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9357661001 + ... + 9357683666.

It is an arithmetic number, because the mean of its divisors is an integer number (30318858362160).

Almost surely, 2^{212101001111111} is an apocalyptic number.

212101001111111 is a deficient number, since it is larger than the sum of its proper divisors (30449865786169).

212101001111111 is a wasteful number, since it uses less digits than its factorization.

212101001111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18715346293.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 212101001111111 its reverse (111111100101212), we get a palindrome (323212101212323).

The spelling of 212101001111111 in words is "two hundred twelve trillion, one hundred one billion, one million, one hundred eleven thousand, one hundred eleven".