212123441 has 4 divisors (see below), whose sum is σ = 213528384. Its totient is φ = 210718500.

The previous prime is 212123419. The next prime is 212123491. The reversal of 212123441 is 144321212.

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 a cyclic number.

It is not a de Polignac number, because 212123441 - 2⁶ = 212123377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212123491) 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, 702245 + ... + 702546.

It is an arithmetic number, because the mean of its divisors is an integer number (53382096).

Almost surely, 2^212123441 is an apocalyptic number.

It is an amenable number.

212123441 is a deficient number, since it is larger than the sum of its proper divisors (1404943).

212123441 is a wasteful number, since it uses less digits than its factorization.

212123441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404942.

The product of its digits is 384, while the sum is 20.

The square root of 212123441 is about 14564.4581430275. The cubic root of 212123441 is about 596.3889037591.

Adding to 212123441 its reverse (144321212), we get a palindrome (356444653).

The spelling of 212123441 in words is "two hundred twelve million, one hundred twenty-three thousand, four hundred forty-one".