212221411 has 2 divisors, whose sum is σ = 212221412. Its totient is φ = 212221410.

The previous prime is 212221409. The next prime is 212221423. The reversal of 212221411 is 114122212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212221411 - 2¹ = 212221409 is a prime.

Together with 212221409, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212201411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110705 + 106110706.

It is an arithmetic number, because the mean of its divisors is an integer number (106110706).

Almost surely, 2^212221411 is an apocalyptic number.

212221411 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221411 is an equidigital number, since it uses as much as digits as its factorization.

212221411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64, while the sum is 16.

The square root of 212221411 is about 14567.8210793516. The cubic root of 212221411 is about 596.4807044387.

Adding to 212221411 its reverse (114122212), we get a palindrome (326343623).

The spelling of 212221411 in words is "two hundred twelve million, two hundred twenty-one thousand, four hundred eleven".