212144231441 has 4 divisors (see below), whose sum is σ = 212156063412. Its totient is φ = 212132399472.

The previous prime is 212144231423. The next prime is 212144231447. The reversal of 212144231441 is 144132441212.

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 151367683600 + 60776547841 = 389060^2 + 246529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212144231441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212144231447) 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, 5889050 + ... + 5924963.

It is an arithmetic number, because the mean of its divisors is an integer number (53039015853).

Almost surely, 2^212144231441 is an apocalyptic number.

It is an amenable number.

212144231441 is a deficient number, since it is larger than the sum of its proper divisors (11831971).

212144231441 is a wasteful number, since it uses less digits than its factorization.

212144231441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11831970.

The product of its digits is 6144, while the sum is 29.

Adding to 212144231441 its reverse (144132441212), we get a palindrome (356276672653).

The spelling of 212144231441 in words is "two hundred twelve billion, one hundred forty-four million, two hundred thirty-one thousand, four hundred forty-one".