221201342 has 16 divisors (see below), whose sum is σ = 335863152. Its totient is φ = 109253760.

The previous prime is 221201339. The next prime is 221201359. The reversal of 221201342 is 243102122.

It is a self number, because there is not a number n which added to its sum of digits gives 221201342.

It is a congruent number.

It is an unprimeable number.

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, 73328 + ... + 76284.

It is an arithmetic number, because the mean of its divisors is an integer number (20991447).

Almost surely, 2^221201342 is an apocalyptic number.

221201342 is a deficient number, since it is larger than the sum of its proper divisors (114661810).

221201342 is a wasteful number, since it uses less digits than its factorization.

221201342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 221201342 is about 14872.8390699288. The cubic root of 221201342 is about 604.7779090565. Note that the first 3 decimals are identical.

Adding to 221201342 its reverse (243102122), we get a palindrome (464303464).

The spelling of 221201342 in words is "two hundred twenty-one million, two hundred one thousand, three hundred forty-two".