21044223242 has 8 divisors (see below), whose sum is σ = 36075811296. Its totient is φ = 9018952812.

The previous prime is 21044223229. The next prime is 21044223251. The reversal of 21044223242 is 24232244012.

21044223242 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-3 number, since 3×21044223242³ (a number of 32 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 751579388 + ... + 751579415.

It is an arithmetic number, because the mean of its divisors is an integer number (4509476412).

Almost surely, 2^21044223242 is an apocalyptic number.

21044223242 is a deficient number, since it is larger than the sum of its proper divisors (15031588054).

21044223242 is a wasteful number, since it uses less digits than its factorization.

21044223242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503158812.

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

Adding to 21044223242 its reverse (24232244012), we get a palindrome (45276467254).

The spelling of 21044223242 in words is "twenty-one billion, forty-four million, two hundred twenty-three thousand, two hundred forty-two".