221148122 has 16 divisors (see below), whose sum is σ = 357740712. Its totient is φ = 101925120.

The previous prime is 221148101. The next prime is 221148133. The reversal of 221148122 is 221841122.

It can be written as a sum of positive squares in 4 ways, for example, as 119924401 + 101223721 = 10951^2 + 10061^2 .

It is an unprimeable number.

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, 14198 + ... + 25374.

Almost surely, 2^221148122 is an apocalyptic number.

221148122 is a deficient number, since it is larger than the sum of its proper divisors (136592590).

221148122 is a wasteful number, since it uses less digits than its factorization.

221148122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11953.

The product of its digits is 512, while the sum is 23.

The square root of 221148122 is about 14871.0497948195. The cubic root of 221148122 is about 604.7294029283.

Adding to 221148122 its reverse (221841122), we get a palindrome (442989244).

The spelling of 221148122 in words is "two hundred twenty-one million, one hundred forty-eight thousand, one hundred twenty-two".