21152515325512 has 32 divisors (see below), whose sum is σ = 39791571408000. Its totient is φ = 10541486859904.

The previous prime is 21152515325429. The next prime is 21152515325569. The reversal of 21152515325512 is 21552351525112.

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 7 ways as a sum of consecutive naturals, for example, 620428 + ... + 6533755.

It is an arithmetic number, because the mean of its divisors is an integer number (1243486606500).

Almost surely, 2^{21152515325512} is an apocalyptic number.

It is an amenable number.

21152515325512 is a deficient number, since it is larger than the sum of its proper divisors (18639056082488).

21152515325512 is a wasteful number, since it uses less digits than its factorization.

21152515325512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7155405 (or 7155401 counting only the distinct ones).

The product of its digits is 150000, while the sum is 40.

The spelling of 21152515325512 in words is "twenty-one trillion, one hundred fifty-two billion, five hundred fifteen million, three hundred twenty-five thousand, five hundred twelve".