212120203 has 4 divisors (see below), whose sum is σ = 224597880. Its totient is φ = 199642528.

The previous prime is 212120201. The next prime is 212120221. The reversal of 212120203 is 302021212.

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 212120203 - 2¹ = 212120201 is a prime.

It is a super-2 number, since 2×212120203² = 89989961041522418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212120201) 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, 6238813 + ... + 6238846.

It is an arithmetic number, because the mean of its divisors is an integer number (56149470).

Almost surely, 2^212120203 is an apocalyptic number.

212120203 is a deficient number, since it is larger than the sum of its proper divisors (12477677).

212120203 is a wasteful number, since it uses less digits than its factorization.

212120203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12477676.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 212120203 is about 14564.3469815849. The cubic root of 212120203 is about 596.3858691784.

Adding to 212120203 its reverse (302021212), we get a palindrome (514141415).

The spelling of 212120203 in words is "two hundred twelve million, one hundred twenty thousand, two hundred three".