211103111121 has 24 divisors (see below), whose sum is σ = 339502601664. Its totient is φ = 114281379360.

The previous prime is 211103111069. The next prime is 211103111137. The reversal of 211103111121 is 121111301112.

It is not a de Polignac number, because 211103111121 - 2⁷ = 211103110993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211103111121.

It is not an unprimeable number, because it can be changed into a prime (211103110121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13915590 + ... + 13930751.

It is an arithmetic number, because the mean of its divisors is an integer number (14145941736).

Almost surely, 2^211103111121 is an apocalyptic number.

211103111121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211103111121 is a deficient number, since it is larger than the sum of its proper divisors (128399490543).

211103111121 is a wasteful number, since it uses less digits than its factorization.

211103111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27846389 (or 27846370 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 211103111121 its reverse (121111301112), we get a palindrome (332214412233).

The spelling of 211103111121 in words is "two hundred eleven billion, one hundred three million, one hundred eleven thousand, one hundred twenty-one".