212534121 has 4 divisors (see below), whose sum is σ = 283378832. Its totient is φ = 141689412.

The previous prime is 212534111. The next prime is 212534137. The reversal of 212534121 is 121435212.

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 212534121 - 2⁵ = 212534089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212534111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35422351 + ... + 35422356.

It is an arithmetic number, because the mean of its divisors is an integer number (70844708).

Almost surely, 2^212534121 is an apocalyptic number.

It is an amenable number.

212534121 is a deficient number, since it is larger than the sum of its proper divisors (70844711).

212534121 is an equidigital number, since it uses as much as digits as its factorization.

212534121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70844710.

The product of its digits is 480, while the sum is 21.

The square root of 212534121 is about 14578.5500307815. The cubic root of 212534121 is about 596.7735337367.

Adding to 212534121 its reverse (121435212), we get a palindrome (333969333).

The spelling of 212534121 in words is "two hundred twelve million, five hundred thirty-four thousand, one hundred twenty-one".