212210110121 has 4 divisors (see below), whose sum is σ = 221436636672. Its totient is φ = 202983583572.

The previous prime is 212210110111. The next prime is 212210110129. The reversal of 212210110121 is 121011012212.

212210110121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212210110121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212210110096 and 212210110105.

It is not an unprimeable number, because it can be changed into a prime (212210110129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4613263241 + ... + 4613263286.

It is an arithmetic number, because the mean of its divisors is an integer number (55359159168).

Almost surely, 2^212210110121 is an apocalyptic number.

It is an amenable number.

212210110121 is a deficient number, since it is larger than the sum of its proper divisors (9226526551).

212210110121 is an equidigital number, since it uses as much as digits as its factorization.

212210110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9226526550.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212210110121 its reverse (121011012212), we get a palindrome (333221122333).

The spelling of 212210110121 in words is "two hundred twelve billion, two hundred ten million, one hundred ten thousand, one hundred twenty-one".