221042411 has 8 divisors (see below), whose sum is σ = 222559920. Its totient is φ = 219530592.

The previous prime is 221042389. The next prime is 221042413. The reversal of 221042411 is 114240122.

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

It is a cyclic number.

It is not a de Polignac number, because 221042411 - 2¹⁸ = 220780267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221042411.

It is not an unprimeable number, because it can be changed into a prime (221042413) by changing a digit.

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, 99236 + ... + 101438.

It is an arithmetic number, because the mean of its divisors is an integer number (27819990).

Almost surely, 2^221042411 is an apocalyptic number.

221042411 is a deficient number, since it is larger than the sum of its proper divisors (1517509).

221042411 is a wasteful number, since it uses less digits than its factorization.

221042411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 221042411 is about 14867.4951151833. The cubic root of 221042411 is about 604.6330320165.

Adding to 221042411 its reverse (114240122), we get a palindrome (335282533).

The spelling of 221042411 in words is "two hundred twenty-one million, forty-two thousand, four hundred eleven".