21160531610512 has 80 divisors (see below), whose sum is σ = 47823428886400. Its totient is φ = 9066573952128.

The previous prime is 21160531610489. The next prime is 21160531610573. The reversal of 21160531610512 is 21501613506112.

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 15 ways as a sum of consecutive naturals, for example, 21991363 + ... + 22933405.

It is an arithmetic number, because the mean of its divisors is an integer number (597792861080).

Almost surely, 2^{21160531610512} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21160531610512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23911714443200).

21160531610512 is an abundant number, since it is smaller than the sum of its proper divisors (26662897275888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21160531610512 is an equidigital number, since it uses as much as digits as its factorization.

21160531610512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946165 (or 946145 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 21160531610512 in words is "twenty-one trillion, one hundred sixty billion, five hundred thirty-one million, six hundred ten thousand, five hundred twelve".