211143421 has 8 divisors (see below), whose sum is σ = 216126144. Its totient is φ = 206216640.

The previous prime is 211143419. The next prime is 211143431. The reversal of 211143421 is 124341112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211143421 - 2¹ = 211143419 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 (211143431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6300 + ... + 21493.

It is an arithmetic number, because the mean of its divisors is an integer number (27015768).

Almost surely, 2^211143421 is an apocalyptic number.

It is an amenable number.

211143421 is a deficient number, since it is larger than the sum of its proper divisors (4982723).

211143421 is a wasteful number, since it uses less digits than its factorization.

211143421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27971.

The product of its digits is 192, while the sum is 19.

The square root of 211143421 is about 14530.7749621278. The cubic root of 211143421 is about 595.4690376888.

Adding to 211143421 its reverse (124341112), we get a palindrome (335484533).

The spelling of 211143421 in words is "two hundred eleven million, one hundred forty-three thousand, four hundred twenty-one".