211121103 has 24 divisors (see below), whose sum is σ = 299289216. Its totient is φ = 132354000.

The previous prime is 211121089. The next prime is 211121107. The reversal of 211121103 is 301121112.

It is not a de Polignac number, because 211121103 - 2¹⁰ = 211120079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162888 + ... + 164178.

It is an arithmetic number, because the mean of its divisors is an integer number (12470384).

Almost surely, 2^211121103 is an apocalyptic number.

211121103 is a deficient number, since it is larger than the sum of its proper divisors (88168113).

211121103 is a wasteful number, since it uses less digits than its factorization.

211121103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483 (or 1464 counting only the distinct ones).

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

The square root of 211121103 is about 14530.0069855455. The cubic root of 211121103 is about 595.4480564584.

Adding to 211121103 its reverse (301121112), we get a palindrome (512242215).

Subtracting 211121103 from its reverse (301121112), we obtain a palindrome (90000009).

The spelling of 211121103 in words is "two hundred eleven million, one hundred twenty-one thousand, one hundred three".