212200100121 has 4 divisors (see below), whose sum is σ = 282933466832. Its totient is φ = 141466733412.

The previous prime is 212200100083. The next prime is 212200100129. The reversal of 212200100121 is 121001002212.

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 not a de Polignac number, because 212200100121 - 2¹¹ = 212200098073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212200100097 and 212200100106.

It is not an unprimeable number, because it can be changed into a prime (212200100129) 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, 35366683351 + ... + 35366683356.

It is an arithmetic number, because the mean of its divisors is an integer number (70733366708).

Almost surely, 2^212200100121 is an apocalyptic number.

It is an amenable number.

212200100121 is a deficient number, since it is larger than the sum of its proper divisors (70733366711).

212200100121 is an equidigital number, since it uses as much as digits as its factorization.

212200100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70733366710.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 212200100121 its reverse (121001002212), we get a palindrome (333201102333).

The spelling of 212200100121 in words is "two hundred twelve billion, two hundred million, one hundred thousand, one hundred twenty-one".