212021122103 has 4 divisors (see below), whose sum is σ = 242309853840. Its totient is φ = 181732390368.

The previous prime is 212021122097. The next prime is 212021122129. The reversal of 212021122103 is 301221120212.

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 212021122103 - 2¹⁶ = 212021056567 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 (212021122003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15144365858 + ... + 15144365871.

It is an arithmetic number, because the mean of its divisors is an integer number (60577463460).

Almost surely, 2^212021122103 is an apocalyptic number.

212021122103 is a deficient number, since it is larger than the sum of its proper divisors (30288731737).

212021122103 is an equidigital number, since it uses as much as digits as its factorization.

212021122103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30288731736.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212021122103 its reverse (301221120212), we get a palindrome (513242242315).

The spelling of 212021122103 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-two thousand, one hundred three".