212333312121 has 32 divisors (see below), whose sum is σ = 338026694400. Its totient is φ = 115989484800.

The previous prime is 212333312119. The next prime is 212333312131. The reversal of 212333312121 is 121213333212.

It is not a de Polignac number, because 212333312121 - 2¹ = 212333312119 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212333312091 and 212333312100.

It is not an unprimeable number, because it can be changed into a prime (212333312131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1664526 + ... + 1787543.

It is an arithmetic number, because the mean of its divisors is an integer number (10563334200).

Almost surely, 2^212333312121 is an apocalyptic number.

212333312121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212333312121 is a deficient number, since it is larger than the sum of its proper divisors (125693382279).

212333312121 is a wasteful number, since it uses less digits than its factorization.

212333312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452209.

The product of its digits is 1296, while the sum is 24.

Adding to 212333312121 its reverse (121213333212), we get a palindrome (333546645333).

The spelling of 212333312121 in words is "two hundred twelve billion, three hundred thirty-three million, three hundred twelve thousand, one hundred twenty-one".