212111100001111 has 8 divisors (see below), whose sum is σ = 212381517680640. Its totient is φ = 211840739347032.

The previous prime is 212111100001069. The next prime is 212111100001127. The reversal of 212111100001111 is 111100001111212.

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 212111100001111 - 2¹¹ = 212111099999063 is a prime.

It is a super-2 number, since 2×212111100001111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212111100001091 and 212111100001100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111100041111) 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, 6809971 + ... + 21693268.

It is an arithmetic number, because the mean of its divisors is an integer number (26547689710080).

Almost surely, 2^{212111100001111} is an apocalyptic number.

212111100001111 is a deficient number, since it is larger than the sum of its proper divisors (270417679529).

212111100001111 is an equidigital number, since it uses as much as digits as its factorization.

212111100001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28512725.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 212111100001111 its reverse (111100001111212), we get a palindrome (323211101112323).

It can be divided in two parts, 212 and 111100001111, that multiplied together give a palindrome (23553200235532).

The spelling of 212111100001111 in words is "two hundred twelve trillion, one hundred eleven billion, one hundred million, one thousand, one hundred eleven".