221041018 has 8 divisors (see below), whose sum is σ = 361703520. Its totient is φ = 100473180.

The previous prime is 221040979. The next prime is 221041019. The reversal of 221041018 is 810140122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221040986 and 221041004.

It is not an unprimeable number, because it can be changed into a prime (221041019) 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, 5023638 + ... + 5023681.

It is an arithmetic number, because the mean of its divisors is an integer number (45212940).

Almost surely, 2^221041018 is an apocalyptic number.

221041018 is a deficient number, since it is larger than the sum of its proper divisors (140662502).

221041018 is a wasteful number, since it uses less digits than its factorization.

221041018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10047332.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 221041018 is about 14867.4482679443. The cubic root of 221041018 is about 604.6317618898.

The spelling of 221041018 in words is "two hundred twenty-one million, forty-one thousand, eighteen".