221471121 has 8 divisors (see below), whose sum is σ = 312665184. Its totient is φ = 138962240.

The previous prime is 221471119. The next prime is 221471147. The reversal of 221471121 is 121174122.

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 221471121 - 2¹ = 221471119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221471101) 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 7 ways as a sum of consecutive naturals, for example, 2171235 + ... + 2171336.

It is an arithmetic number, because the mean of its divisors is an integer number (39083148).

Almost surely, 2^221471121 is an apocalyptic number.

It is an amenable number.

221471121 is a deficient number, since it is larger than the sum of its proper divisors (91194063).

221471121 is a wasteful number, since it uses less digits than its factorization.

221471121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4342591.

The product of its digits is 224, while the sum is 21.

The square root of 221471121 is about 14881.9058255319. The cubic root of 221471121 is about 605.0236732307.

The spelling of 221471121 in words is "two hundred twenty-one million, four hundred seventy-one thousand, one hundred twenty-one".