21001607816315 has 8 divisors (see below), whose sum is σ = 28802205005280. Its totient is φ = 14401102502592.

The previous prime is 21001607816297. The next prime is 21001607816393. The reversal of 21001607816315 is 51361870610012.

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

It is a cyclic number.

It is not a de Polignac number, because 21001607816315 - 2³⁸ = 20726729909371 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300022968770 + ... + 300022968839.

It is an arithmetic number, because the mean of its divisors is an integer number (3600275625660).

Almost surely, 2^{21001607816315} is an apocalyptic number.

21001607816315 is a deficient number, since it is larger than the sum of its proper divisors (7800597188965).

21001607816315 is an equidigital number, since it uses as much as digits as its factorization.

21001607816315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600045937621.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 21001607816315 in words is "twenty-one trillion, one billion, six hundred seven million, eight hundred sixteen thousand, three hundred fifteen".