221242116 has 48 divisors (see below), whose sum is σ = 524018880. Its totient is φ = 72643200.

The previous prime is 221242103. The next prime is 221242127. The reversal of 221242116 is 611242122.

221242116 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 221242092 and 221242101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335395 + ... + 336053.

It is an arithmetic number, because the mean of its divisors is an integer number (10917060).

Almost surely, 2^221242116 is an apocalyptic number.

It is an amenable number.

221242116 is an abundant number, since it is smaller than the sum of its proper divisors (302776764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221242116 is a wasteful number, since it uses less digits than its factorization.

221242116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044 (or 1042 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 221242116 is about 14874.2097605217. The cubic root of 221242116 is about 604.8150663046.

Adding to 221242116 its reverse (611242122), we get a palindrome (832484238).

The spelling of 221242116 in words is "two hundred twenty-one million, two hundred forty-two thousand, one hundred sixteen".