212300222121 has 24 divisors (see below), whose sum is σ = 330291231816. Its totient is φ = 130627918080.

The previous prime is 212300222111. The next prime is 212300222129. The reversal of 212300222121 is 121222003212.

212300222121 is a `hidden beast` number, since 21 + 2 + 300 + 222 + 121 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 30210263721 + 182089958400 = 173811^2 + 426720^2 .

It is not a de Polignac number, because 212300222121 - 2⁵ = 212300222089 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212300222094 and 212300222103.

It is not an unprimeable number, because it can be changed into a prime (212300222129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 732631 + ... + 980483.

It is an arithmetic number, because the mean of its divisors is an integer number (13762134659).

Almost surely, 2^212300222121 is an apocalyptic number.

It is an amenable number.

212300222121 is a deficient number, since it is larger than the sum of its proper divisors (117991009695).

212300222121 is a wasteful number, since it uses less digits than its factorization.

212300222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255193 (or 255190 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212300222121 its reverse (121222003212), we get a palindrome (333522225333).

The spelling of 212300222121 in words is "two hundred twelve billion, three hundred million, two hundred twenty-two thousand, one hundred twenty-one".