221333213401 has 4 divisors (see below), whose sum is σ = 221374908900. Its totient is φ = 221291517904.

The previous prime is 221333213383. The next prime is 221333213407. The reversal of 221333213401 is 104312333122.

221333213401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78240481225 + 143092732176 = 279715^2 + 378276^2 .

It is a cyclic number.

It is not a de Polignac number, because 221333213401 - 2⁵ = 221333213369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221333213407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20839786 + ... + 20850403.

It is an arithmetic number, because the mean of its divisors is an integer number (55343727225).

Almost surely, 2^221333213401 is an apocalyptic number.

It is an amenable number.

221333213401 is a deficient number, since it is larger than the sum of its proper divisors (41695499).

221333213401 is an equidigital number, since it uses as much as digits as its factorization.

221333213401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41695498.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 221333213401 its reverse (104312333122), we get a palindrome (325645546523).

The spelling of 221333213401 in words is "two hundred twenty-one billion, three hundred thirty-three million, two hundred thirteen thousand, four hundred one".