221314021 has 8 divisors (see below), whose sum is σ = 223257600. Its totient is φ = 219376848.

The previous prime is 221314019. The next prime is 221314097. The reversal of 221314021 is 120413122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221314021 - 2¹ = 221314019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221313986 and 221314004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221324021) 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 7 ways as a sum of consecutive naturals, for example, 89220 + ... + 91666.

It is an arithmetic number, because the mean of its divisors is an integer number (27907200).

Almost surely, 2^221314021 is an apocalyptic number.

It is an amenable number.

221314021 is a deficient number, since it is larger than the sum of its proper divisors (1943579).

221314021 is a wasteful number, since it uses less digits than its factorization.

221314021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 221314021 is about 14876.6266673598. The cubic root of 221314021 is about 604.8805820355.

Adding to 221314021 its reverse (120413122), we get a palindrome (341727143).

The spelling of 221314021 in words is "two hundred twenty-one million, three hundred fourteen thousand, twenty-one".