212433121 has 4 divisors (see below), whose sum is σ = 214820100. Its totient is φ = 210046144.

The previous prime is 212433103. The next prime is 212433131. The reversal of 212433121 is 121334212.

It is a happy number.

212433121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52056225 + 160376896 = 7215^2 + 12664^2 .

It is a cyclic number.

It is not a de Polignac number, because 212433121 - 2¹⁷ = 212302049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212433131) 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, 1193356 + ... + 1193533.

It is an arithmetic number, because the mean of its divisors is an integer number (53705025).

Almost surely, 2^212433121 is an apocalyptic number.

It is an amenable number.

212433121 is a deficient number, since it is larger than the sum of its proper divisors (2386979).

212433121 is an equidigital number, since it uses as much as digits as its factorization.

212433121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386978.

The product of its digits is 288, while the sum is 19.

The square root of 212433121 is about 14575.0856258205. The cubic root of 212433121 is about 596.6789862872.

Adding to 212433121 its reverse (121334212), we get a palindrome (333767333).

It can be divided in two parts, 2124 and 33121, that added together give a triangular number (35245 = T₂₆₅).

The spelling of 212433121 in words is "two hundred twelve million, four hundred thirty-three thousand, one hundred twenty-one".