211334421 has 16 divisors (see below), whose sum is σ = 284276736. Its totient is φ = 139646976.

The previous prime is 211334413. The next prime is 211334423. The reversal of 211334421 is 124433112.

It is not a de Polignac number, because 211334421 - 2³ = 211334413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211334423) 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 15 ways as a sum of consecutive naturals, for example, 221281 + ... + 222233.

It is an arithmetic number, because the mean of its divisors is an integer number (17767296).

Almost surely, 2^211334421 is an apocalyptic number.

It is an amenable number.

211334421 is a deficient number, since it is larger than the sum of its proper divisors (72942315).

211334421 is a wasteful number, since it uses less digits than its factorization.

211334421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532.

The product of its digits is 576, while the sum is 21.

The square root of 211334421 is about 14537.3457343492. The cubic root of 211334421 is about 595.6485370202.

Adding to 211334421 its reverse (124433112), we get a palindrome (335767533).

The spelling of 211334421 in words is "two hundred eleven million, three hundred thirty-four thousand, four hundred twenty-one".