212002122121 has 4 divisors (see below), whose sum is σ = 212061294592. Its totient is φ = 211942949652.

The previous prime is 212002122109. The next prime is 212002122161. The reversal of 212002122121 is 121221200212.

It is a happy number.

212002122121 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 not a de Polignac number, because 212002122121 - 2⁵ = 212002122089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212002122095 and 212002122104.

It is not an unprimeable number, because it can be changed into a prime (212002122161) 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, 29580861 + ... + 29588026.

It is an arithmetic number, because the mean of its divisors is an integer number (53015323648).

Almost surely, 2^212002122121 is an apocalyptic number.

It is an amenable number.

212002122121 is a deficient number, since it is larger than the sum of its proper divisors (59172471).

212002122121 is an equidigital number, since it uses as much as digits as its factorization.

212002122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59172470.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212002122121 its reverse (121221200212), we get a palindrome (333223322333).

The spelling of 212002122121 in words is "two hundred twelve billion, two million, one hundred twenty-two thousand, one hundred twenty-one".