211112101121 has 4 divisors (see below), whose sum is σ = 216021684912. Its totient is φ = 206202517332.

The previous prime is 211112101099. The next prime is 211112101129. The reversal of 211112101121 is 121101211112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211112101121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211112101096 and 211112101105.

It is not an unprimeable number, because it can be changed into a prime (211112101129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2454791831 + ... + 2454791916.

It is an arithmetic number, because the mean of its divisors is an integer number (54005421228).

Almost surely, 2^211112101121 is an apocalyptic number.

It is an amenable number.

211112101121 is a deficient number, since it is larger than the sum of its proper divisors (4909583791).

211112101121 is an equidigital number, since it uses as much as digits as its factorization.

211112101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4909583790.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 211112101121 its reverse (121101211112), we get a palindrome (332213312233).

The spelling of 211112101121 in words is "two hundred eleven billion, one hundred twelve million, one hundred one thousand, one hundred twenty-one".