21223412242 has 8 divisors (see below), whose sum is σ = 33219254016. Its totient is φ = 10150327572.

The previous prime is 21223412233. The next prime is 21223412263. The reversal of 21223412242 is 24221432212.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230689218 + ... + 230689309.

It is an arithmetic number, because the mean of its divisors is an integer number (4152406752).

Almost surely, 2^21223412242 is an apocalyptic number.

21223412242 is a deficient number, since it is larger than the sum of its proper divisors (11995841774).

21223412242 is a wasteful number, since it uses less digits than its factorization.

21223412242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461378552.

The product of its digits is 3072, while the sum is 25.

Adding to 21223412242 its reverse (24221432212), we get a palindrome (45444844454).

The spelling of 21223412242 in words is "twenty-one billion, two hundred twenty-three million, four hundred twelve thousand, two hundred forty-two".