212100112111 has 8 divisors (see below), whose sum is σ = 224638300944. Its totient is φ = 199568780160.

The previous prime is 212100112097. The next prime is 212100112123. The reversal of 212100112111 is 111211001212.

It is a happy number.

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 212100112111 - 2⁵ = 212100112079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212100112091 and 212100112100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100112151) 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, 1650460 + ... + 1774321.

It is an arithmetic number, because the mean of its divisors is an integer number (28079787618).

Almost surely, 2^212100112111 is an apocalyptic number.

212100112111 is a deficient number, since it is larger than the sum of its proper divisors (12538188833).

212100112111 is a wasteful number, since it uses less digits than its factorization.

212100112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3428441.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 212100112111 its reverse (111211001212), we get a palindrome (323311113323).

The spelling of 212100112111 in words is "two hundred twelve billion, one hundred million, one hundred twelve thousand, one hundred eleven".