212012200121 has 4 divisors (see below), whose sum is σ = 213196626000. Its totient is φ = 210827774244.

The previous prime is 212012200087. The next prime is 212012200151. The reversal of 212012200121 is 121002210212.

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-212012200121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212012200096 and 212012200105.

It is not an unprimeable number, because it can be changed into a prime (212012200151) 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, 592212671 + ... + 592213028.

It is an arithmetic number, because the mean of its divisors is an integer number (53299156500).

Almost surely, 2^212012200121 is an apocalyptic number.

It is an amenable number.

212012200121 is a deficient number, since it is larger than the sum of its proper divisors (1184425879).

212012200121 is a wasteful number, since it uses less digits than its factorization.

212012200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184425878.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212012200121 its reverse (121002210212), we get a palindrome (333014410333).

The spelling of 212012200121 in words is "two hundred twelve billion, twelve million, two hundred thousand, one hundred twenty-one".