221411401 has 2 divisors, whose sum is σ = 221411402. Its totient is φ = 221411400.

The previous prime is 221411387. The next prime is 221411423. The reversal of 221411401 is 104114122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118287376 + 103124025 = 10876^2 + 10155^2 .

It is a cyclic number.

It is not a de Polignac number, because 221411401 - 2²⁵ = 187856969 is a prime.

It is not a weakly prime, because it can be changed into another prime (221411431) 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 as a sum of consecutive naturals, namely, 110705700 + 110705701.

It is an arithmetic number, because the mean of its divisors is an integer number (110705701).

Almost surely, 2^221411401 is an apocalyptic number.

It is an amenable number.

221411401 is a deficient number, since it is larger than the sum of its proper divisors (1).

221411401 is an equidigital number, since it uses as much as digits as its factorization.

221411401 is an odious number, because the sum of its binary digits is odd.

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

The square root of 221411401 is about 14879.8992268093. The cubic root of 221411401 is about 604.9692865131.

Adding to 221411401 its reverse (104114122), we get a palindrome (325525523).

The spelling of 221411401 in words is "two hundred twenty-one million, four hundred eleven thousand, four hundred one".