8101520124 has 72 divisors (see below), whose sum is σ = 20175961680. Its totient is φ = 2529508608.

The previous prime is 8101520113. The next prime is 8101520263. The reversal of 8101520124 is 4210251018.

It is a junction number, because it is equal to n+sod(n) for n = 8101520094 and 8101520103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 375042 + ... + 396054.

It is an arithmetic number, because the mean of its divisors is an integer number (280221690).

Almost surely, 2^8101520124 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 8101520124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10087980840).

8101520124 is an abundant number, since it is smaller than the sum of its proper divisors (12074441556).

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

8101520124 is a wasteful number, since it uses less digits than its factorization.

8101520124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21147 (or 21126 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 8101520124 is about 90008.4447371467. Note that the first 3 decimals coincide. The cubic root of 8101520124 is about 2008.4244746220.

The spelling of 8101520124 in words is "eight billion, one hundred one million, five hundred twenty thousand, one hundred twenty-four".