221221200442 has 16 divisors (see below), whose sum is σ = 368828487072. Its totient is φ = 98657824720.

The previous prime is 221221200427. The next prime is 221221200509. The reversal of 221221200442 is 244002122122.

221221200442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94862128 + ... + 94864459.

It is an arithmetic number, because the mean of its divisors is an integer number (23051780442).

Almost surely, 2^221221200442 is an apocalyptic number.

221221200442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221221200442 is a deficient number, since it is larger than the sum of its proper divisors (147607286630).

221221200442 is a wasteful number, since it uses less digits than its factorization.

221221200442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189726653.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 221221200442 its reverse (244002122122), we get a palindrome (465223322564).

The spelling of 221221200442 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, four hundred forty-two".