21422223242 has 16 divisors (see below), whose sum is σ = 36856394880. Its totient is φ = 9147806928.

The previous prime is 21422223217. The next prime is 21422223247. The reversal of 21422223242 is 24232222412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21422223247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2758142 + ... + 2765897.

It is an arithmetic number, because the mean of its divisors is an integer number (2303524680).

Almost surely, 2^21422223242 is an apocalyptic number.

21422223242 is a deficient number, since it is larger than the sum of its proper divisors (15434171638).

21422223242 is a wasteful number, since it uses less digits than its factorization.

21422223242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5524325.

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

Adding to 21422223242 its reverse (24232222412), we get a palindrome (45654445654).

The spelling of 21422223242 in words is "twenty-one billion, four hundred twenty-two million, two hundred twenty-three thousand, two hundred forty-two".