21404626557122 has 8 divisors (see below), whose sum is σ = 32586147893136. Its totient is φ = 10542577259412.

The previous prime is 21404626557109. The next prime is 21404626557137. The reversal of 21404626557122 is 22175562640412.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79868009408 + ... + 79868009675.

It is an arithmetic number, because the mean of its divisors is an integer number (4073268486642).

Almost surely, 2^{21404626557122} is an apocalyptic number.

21404626557122 is a deficient number, since it is larger than the sum of its proper divisors (11181521336014).

21404626557122 is a wasteful number, since it uses less digits than its factorization.

21404626557122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159736019152.

The product of its (nonzero) digits is 1612800, while the sum is 47.

The spelling of 21404626557122 in words is "twenty-one trillion, four hundred four billion, six hundred twenty-six million, five hundred fifty-seven thousand, one hundred twenty-two".