221447122 has 24 divisors (see below), whose sum is σ = 361384740. Its totient is φ = 101724480.

The previous prime is 221447101. The next prime is 221447129. The reversal of 221447122 is 221744122.

It can be written as a sum of positive squares in 6 ways, for example, as 88529281 + 132917841 = 9409^2 + 11529^2 .

It is not an unprimeable number, because it can be changed into a prime (221447129) 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 11 ways as a sum of consecutive naturals, for example, 75972 + ... + 78832.

Almost surely, 2^221447122 is an apocalyptic number.

221447122 is a deficient number, since it is larger than the sum of its proper divisors (139937618).

221447122 is a wasteful number, since it uses less digits than its factorization.

221447122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3118 (or 3105 counting only the distinct ones).

The product of its digits is 1792, while the sum is 25.

The square root of 221447122 is about 14881.0994889491. The cubic root of 221447122 is about 605.0018186317.

The spelling of 221447122 in words is "two hundred twenty-one million, four hundred forty-seven thousand, one hundred twenty-two".