21357003571242 has 8 divisors (see below), whose sum is σ = 42714007142496. Its totient is φ = 7119001190412.

The previous prime is 21357003571199. The next prime is 21357003571259. The reversal of 21357003571242 is 24217530075312.

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

21357003571242 is an admirable number.

It is a super-3 number, since 3×21357003571242³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21357003571194 and 21357003571203.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1779750297598 + ... + 1779750297609.

It is an arithmetic number, because the mean of its divisors is an integer number (5339250892812).

Almost surely, 2^{21357003571242} is an apocalyptic number.

21357003571242 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.

21357003571242 is a wasteful number, since it uses less digits than its factorization.

21357003571242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3559500595212.

The product of its (nonzero) digits is 352800, while the sum is 42.

The spelling of 21357003571242 in words is "twenty-one trillion, three hundred fifty-seven billion, three million, five hundred seventy-one thousand, two hundred forty-two".