211421326 has 8 divisors (see below), whose sum is σ = 317195424. Its totient is φ = 105689520.

The previous prime is 211421321. The next prime is 211421387. The reversal of 211421326 is 623124112.

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

It is a junction number, because it is equal to n+sod(n) for n = 211421297 and 211421306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211421321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9706 + ... + 22738.

It is an arithmetic number, because the mean of its divisors is an integer number (39649428).

Almost surely, 2^211421326 is an apocalyptic number.

211421326 is a deficient number, since it is larger than the sum of its proper divisors (105774098).

211421326 is a wasteful number, since it uses less digits than its factorization.

211421326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21146.

The product of its digits is 576, while the sum is 22.

The square root of 211421326 is about 14540.3344528247. The cubic root of 211421326 is about 595.7301734173.

Adding to 211421326 its reverse (623124112), we get a palindrome (834545438).

The spelling of 211421326 in words is "two hundred eleven million, four hundred twenty-one thousand, three hundred twenty-six".