221042116 has 12 divisors (see below), whose sum is σ = 387199120. Its totient is φ = 110413800.

The previous prime is 221042113. The next prime is 221042117. The reversal of 221042116 is 611240122.

221042116 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221042093 and 221042102.

It is not an unprimeable number, because it can be changed into a prime (221042113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22086 + ... + 30493.

Almost surely, 2^221042116 is an apocalyptic number.

It is an amenable number.

221042116 is a deficient number, since it is larger than the sum of its proper divisors (166157004).

221042116 is a wasteful number, since it uses less digits than its factorization.

221042116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53634 (or 53632 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 221042116 is about 14867.4851942082. The cubic root of 221042116 is about 604.6327630382.

Adding to 221042116 its reverse (611240122), we get a palindrome (832282238).

The spelling of 221042116 in words is "two hundred twenty-one million, forty-two thousand, one hundred sixteen".