22121242004440 has 32 divisors (see below), whose sum is σ = 50616401202000. Its totient is φ = 8698522278784.

The previous prime is 22121242004429. The next prime is 22121242004531. The reversal of 22121242004440 is 4440024212122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22121242004399 and 22121242004408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4686701455 + ... + 4686706174.

Almost surely, 2^{22121242004440} is an apocalyptic number.

22121242004440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121242004440 is an abundant number, since it is smaller than the sum of its proper divisors (28495159197560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121242004440 is a wasteful number, since it uses less digits than its factorization.

22121242004440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9373407699 (or 9373407695 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 22121242004440 its reverse (4440024212122), we get a palindrome (26561266216562).

The spelling of 22121242004440 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred forty-two million, four thousand, four hundred forty".