212212100002121 has 4 divisors (see below), whose sum is σ = 212212172811792. Its totient is φ = 212212027192452.

The previous prime is 212212100002073. The next prime is 212212100002151. The reversal of 212212100002121 is 121200001212212.

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 212212100002121 - 2¹⁴ = 212212099985737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212212100002121.

It is not an unprimeable number, because it can be changed into a prime (212212100002151) 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, 31842311 + ... + 37925676.

It is an arithmetic number, because the mean of its divisors is an integer number (53053043202948).

Almost surely, 2^{212212100002121} is an apocalyptic number.

It is an amenable number.

212212100002121 is a deficient number, since it is larger than the sum of its proper divisors (72809671).

212212100002121 is an equidigital number, since it uses as much as digits as its factorization.

212212100002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72809670.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212212100002121 its reverse (121200001212212), we get a palindrome (333412101214333).

The spelling of 212212100002121 in words is "two hundred twelve trillion, two hundred twelve billion, one hundred million, two thousand, one hundred twenty-one".