22121204044 has 12 divisors (see below), whose sum is σ = 38715196744. Its totient is φ = 11059719264.

The previous prime is 22121204041. The next prime is 22121204051. The reversal of 22121204044 is 44040212122.

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 3 ways as a sum of consecutive naturals, for example, 162609 + ... + 265864.

Almost surely, 2^22121204044 is an apocalyptic number.

It is an amenable number.

22121204044 is a deficient number, since it is larger than the sum of its proper divisors (16593992700).

22121204044 is a wasteful number, since it uses less digits than its factorization.

22121204044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441384 (or 441382 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 22121204044 its reverse (44040212122), we get a palindrome (66161416166).

The spelling of 22121204044 in words is "twenty-two billion, one hundred twenty-one million, two hundred four thousand, forty-four".