21163316344042 has 8 divisors (see below), whose sum is σ = 31748056284132. Its totient is φ = 10580630916000.

The previous prime is 21163316344019. The next prime is 21163316344061. The reversal of 21163316344042 is 24044361336112.

It can be written as a sum of positive squares in 2 ways, for example, as 15747079491081 + 5416236852961 = 3968259^2 + 2327281^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21163316343986 and 21163316344004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513602259 + ... + 513643462.

Almost surely, 2^{21163316344042} is an apocalyptic number.

21163316344042 is a deficient number, since it is larger than the sum of its proper divisors (10584739940090).

21163316344042 is a wasteful number, since it uses less digits than its factorization.

21163316344042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027256024.

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 21163316344042 in words is "twenty-one trillion, one hundred sixty-three billion, three hundred sixteen million, three hundred forty-four thousand, forty-two".