21331322009985 has 64 divisors (see below), whose sum is σ = 37808220231936. Its totient is φ = 10202924851200.

The previous prime is 21331322009971. The next prime is 21331322009993. The reversal of 21331322009985 is 58990022313312.

It is not a de Polignac number, because 21331322009985 - 2¹³ = 21331322001793 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3608647 + ... + 7462236.

It is an arithmetic number, because the mean of its divisors is an integer number (590753441124).

Almost surely, 2^{21331322009985} is an apocalyptic number.

It is an amenable number.

21331322009985 is a deficient number, since it is larger than the sum of its proper divisors (16476898221951).

21331322009985 is a wasteful number, since it uses less digits than its factorization.

21331322009985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11071186.

The product of its (nonzero) digits is 699840, while the sum is 48.

The spelling of 21331322009985 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred twenty-two million, nine thousand, nine hundred eighty-five".