221310001 has 4 divisors (see below), whose sum is σ = 241429104. Its totient is φ = 201190900.

The previous prime is 221309989. The next prime is 221310031. The reversal of 221310001 is 100013122.

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.

It is a cyclic number.

It is not a de Polignac number, because 221310001 - 2⁵ = 221309969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221310001.

It is not an unprimeable number, because it can be changed into a prime (221310031) 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 in 3 ways as a sum of consecutive naturals, for example, 10059535 + ... + 10059556.

It is an arithmetic number, because the mean of its divisors is an integer number (60357276).

Almost surely, 2^221310001 is an apocalyptic number.

It is an amenable number.

221310001 is a deficient number, since it is larger than the sum of its proper divisors (20119103).

221310001 is a wasteful number, since it uses less digits than its factorization.

221310001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20119102.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 221310001 is about 14876.4915554710. The cubic root of 221310001 is about 604.8769196155.

Adding to 221310001 its reverse (100013122), we get a palindrome (321323123).

The spelling of 221310001 in words is "two hundred twenty-one million, three hundred ten thousand, one".