221232400442 has 64 divisors (see below), whose sum is σ = 352836311040. Its totient is φ = 103913409600.

The previous prime is 221232400409. The next prime is 221232400451. The reversal of 221232400442 is 244004232122.

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 31 ways as a sum of consecutive naturals, for example, 63009467 + ... + 63012977.

It is an arithmetic number, because the mean of its divisors is an integer number (5513067360).

Almost surely, 2^221232400442 is an apocalyptic number.

221232400442 is a deficient number, since it is larger than the sum of its proper divisors (131603910598).

221232400442 is a wasteful number, since it uses less digits than its factorization.

221232400442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 221232400442 its reverse (244004232122), we get a palindrome (465236632564).

The spelling of 221232400442 in words is "two hundred twenty-one billion, two hundred thirty-two million, four hundred thousand, four hundred forty-two".