21120042422 has 8 divisors (see below), whose sum is σ = 33057457776. Its totient is φ = 10100889832.

The previous prime is 21120042403. The next prime is 21120042443. The reversal of 21120042422 is 22424002112.

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

It is a junction number, because it is equal to n+sod(n) for n = 21120042394 and 21120042403.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 229565633 + ... + 229565724.

It is an arithmetic number, because the mean of its divisors is an integer number (4132182222).

Almost surely, 2^21120042422 is an apocalyptic number.

21120042422 is a deficient number, since it is larger than the sum of its proper divisors (11937415354).

21120042422 is a wasteful number, since it uses less digits than its factorization.

21120042422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459131382.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21120042422 its reverse (22424002112), we get a palindrome (43544044534).

The spelling of 21120042422 in words is "twenty-one billion, one hundred twenty million, forty-two thousand, four hundred twenty-two".