22121204042 has 16 divisors (see below), whose sum is σ = 38846993472. Its totient is φ = 9249283680.

The previous prime is 22121204041. The next prime is 22121204051. The reversal of 22121204042 is 24040212122.

It is not an unprimeable number, because it can be changed into a prime (22121204041) 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, 19268768 + ... + 19269915.

It is an arithmetic number, because the mean of its divisors is an integer number (2427937092).

Almost surely, 2^22121204042 is an apocalyptic number.

22121204042 is a deficient number, since it is larger than the sum of its proper divisors (16725789430).

22121204042 is a wasteful number, since it uses less digits than its factorization.

22121204042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38538733.

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

Adding to 22121204042 its reverse (24040212122), we get a palindrome (46161416164).

The spelling of 22121204042 in words is "twenty-two billion, one hundred twenty-one million, two hundred four thousand, forty-two".