221311042 has 8 divisors (see below), whose sum is σ = 332355600. Its totient is φ = 110525844.

The previous prime is 221311039. The next prime is 221311043. The reversal of 221311042 is 240113122.

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

It is a super-2 number, since 2×221311042² = 97957154622251528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221311043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62692 + ... + 66127.

It is an arithmetic number, because the mean of its divisors is an integer number (41544450).

Almost surely, 2^221311042 is an apocalyptic number.

221311042 is a deficient number, since it is larger than the sum of its proper divisors (111044558).

221311042 is a wasteful number, since it uses less digits than its factorization.

221311042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129680.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 221311042 is about 14876.5265435181. The cubic root of 221311042 is about 604.8778680226.

Adding to 221311042 its reverse (240113122), we get a palindrome (461424164).

The spelling of 221311042 in words is "two hundred twenty-one million, three hundred eleven thousand, forty-two".