221413211 has 2 divisors, whose sum is σ = 221413212. Its totient is φ = 221413210.

The previous prime is 221413189. The next prime is 221413237. The reversal of 221413211 is 112314122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221413211 - 2¹⁸ = 221151067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221413211.

It is not a weakly prime, because it can be changed into another prime (221413261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110706605 + 110706606.

It is an arithmetic number, because the mean of its divisors is an integer number (110706606).

Almost surely, 2^221413211 is an apocalyptic number.

221413211 is a deficient number, since it is larger than the sum of its proper divisors (1).

221413211 is an equidigital number, since it uses as much as digits as its factorization.

221413211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 17.

The square root of 221413211 is about 14879.9600469894. The cubic root of 221413211 is about 604.9709350152.

Adding to 221413211 its reverse (112314122), we get a palindrome (333727333).

It can be divided in two parts, 22141 and 3211, that added together give a palindrome (25352).

The spelling of 221413211 in words is "two hundred twenty-one million, four hundred thirteen thousand, two hundred eleven".