211244424421 has 16 divisors (see below), whose sum is σ = 227983614768. Its totient is φ = 194987520000.

The previous prime is 211244424403. The next prime is 211244424467. The reversal of 211244424421 is 124424442112.

211244424421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1288020321 + 209956404100 = 35889^2 + 458210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211244424421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211244424491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2224921 + ... + 2317921.

It is an arithmetic number, because the mean of its divisors is an integer number (14248975923).

Almost surely, 2^211244424421 is an apocalyptic number.

It is an amenable number.

211244424421 is a deficient number, since it is larger than the sum of its proper divisors (16739190347).

211244424421 is a wasteful number, since it uses less digits than its factorization.

211244424421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95592.

The product of its digits is 16384, while the sum is 31.

Adding to 211244424421 its reverse (124424442112), we get a palindrome (335668866533).

The spelling of 211244424421 in words is "two hundred eleven billion, two hundred forty-four million, four hundred twenty-four thousand, four hundred twenty-one".