22121887793440 has 48 divisors (see below), whose sum is σ = 52283512568448. Its totient is φ = 8845275302656.

The previous prime is 22121887793353. The next prime is 22121887793441. The reversal of 22121887793440 is 4439778812122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22121887793441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26777902 + ... + 27591661.

It is an arithmetic number, because the mean of its divisors is an integer number (1089239845176).

Almost surely, 2^{22121887793440} is an apocalyptic number.

22121887793440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121887793440 is an abundant number, since it is smaller than the sum of its proper divisors (30161624775008).

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

22121887793440 is a wasteful number, since it uses less digits than its factorization.

22121887793440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54372121 (or 54372113 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 58.

The spelling of 22121887793440 in words is "twenty-two trillion, one hundred twenty-one billion, eight hundred eighty-seven million, seven hundred ninety-three thousand, four hundred forty".