21223030042 has 8 divisors (see below), whose sum is σ = 31835208096. Its totient is φ = 10611294012.

The previous prime is 21223030033. The next prime is 21223030043. The reversal of 21223030042 is 24003032212.

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

It is not an unprimeable number, because it can be changed into a prime (21223030043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65763 + ... + 216265.

It is an arithmetic number, because the mean of its divisors is an integer number (3979401012).

Almost surely, 2^21223030042 is an apocalyptic number.

21223030042 is a deficient number, since it is larger than the sum of its proper divisors (10612178054).

21223030042 is a wasteful number, since it uses less digits than its factorization.

21223030042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221012.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21223030042 its reverse (24003032212), we get a palindrome (45226062254).

The spelling of 21223030042 in words is "twenty-one billion, two hundred twenty-three million, thirty thousand, forty-two".