221343101 has 4 divisors (see below), whose sum is σ = 252963552. Its totient is φ = 189722652.

The previous prime is 221343097. The next prime is 221343107. The reversal of 221343101 is 101343122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 101343122 = 2 ⋅50671561.

It is not a de Polignac number, because 221343101 - 2² = 221343097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221343101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221343107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15810215 + ... + 15810228.

It is an arithmetic number, because the mean of its divisors is an integer number (63240888).

Almost surely, 2^221343101 is an apocalyptic number.

It is an amenable number.

221343101 is a deficient number, since it is larger than the sum of its proper divisors (31620451).

221343101 is an equidigital number, since it uses as much as digits as its factorization.

221343101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31620450.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 221343101 is about 14877.6040073662. The cubic root of 221343101 is about 604.9070740413.

Adding to 221343101 its reverse (101343122), we get a palindrome (322686223).

The spelling of 221343101 in words is "two hundred twenty-one million, three hundred forty-three thousand, one hundred one".