212333121 has 144 divisors (see below), whose sum is σ = 433929600. Its totient is φ = 99066240.

The previous prime is 212333087. The next prime is 212333123. The reversal of 212333121 is 121333212.

212333121 is a `hidden beast` number, since 212 + 333 + 121 = 666.

212333121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212333121 - 2⁷ = 212332993 is a prime.

It is a super-3 number, since 3×212333121³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212333094 and 212333103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212333123) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 5738715 + ... + 5738751.

It is an arithmetic number, because the mean of its divisors is an integer number (3013400).

Almost surely, 2^212333121 is an apocalyptic number.

212333121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212333121 is an abundant number, since it is smaller than the sum of its proper divisors (221596479).

212333121 is a wasteful number, since it uses less digits than its factorization.

212333121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 71 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 212333121 is about 14571.6547104301. The cubic root of 212333121 is about 596.5853454221.

Adding to 212333121 its reverse (121333212), we get a palindrome (333666333).

Subtracting from 212333121 its reverse (121333212), we obtain a palindrome (90999909).

It can be divided in two parts, 212 and 333121, that added together give a palindrome (333333).

The spelling of 212333121 in words is "two hundred twelve million, three hundred thirty-three thousand, one hundred twenty-one".