21122554422 has 8 divisors (see below), whose sum is σ = 42245108856. Its totient is φ = 7040851472.

The previous prime is 21122554309. The next prime is 21122554477. The reversal of 21122554422 is 22445522112.

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

21122554422 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21122554422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760212863 + ... + 1760212874.

It is an arithmetic number, because the mean of its divisors is an integer number (5280638607).

Almost surely, 2^21122554422 is an apocalyptic number.

21122554422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21122554422 is a wasteful number, since it uses less digits than its factorization.

21122554422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520425742.

The product of its digits is 12800, while the sum is 30.

The spelling of 21122554422 in words is "twenty-one billion, one hundred twenty-two million, five hundred fifty-four thousand, four hundred twenty-two".