212011103 has 4 divisors (see below), whose sum is σ = 212184840. Its totient is φ = 211837368.

The previous prime is 212011087. The next prime is 212011117. The reversal of 212011103 is 301110212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212011103 - 2⁴ = 212011087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011153) 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, 85025 + ... + 87482.

It is an arithmetic number, because the mean of its divisors is an integer number (53046210).

Almost surely, 2^212011103 is an apocalyptic number.

212011103 is a deficient number, since it is larger than the sum of its proper divisors (173737).

212011103 is a wasteful number, since it uses less digits than its factorization.

212011103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173736.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 212011103 is about 14560.6010521544. The cubic root of 212011103 is about 596.2836050601.

Adding to 212011103 its reverse (301110212), we get a palindrome (513121315).

The spelling of 212011103 in words is "two hundred twelve million, eleven thousand, one hundred three".