1016060021520 has 80 divisors (see below), whose sum is σ = 3335067613440. Its totient is φ = 255011141632.

The previous prime is 1016060021491. The next prime is 1016060021563. The reversal of 1016060021520 is 251200606101.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1016060021520² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124513080 + ... + 124521239.

It is an arithmetic number, because the mean of its divisors is an integer number (41688345168).

Almost surely, 2^{1016060021520} is an apocalyptic number.

1016060021520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1016060021520 is an abundant number, since it is smaller than the sum of its proper divisors (2319007591920).

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

1016060021520 is a wasteful number, since it uses less digits than its factorization.

1016060021520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249034352 (or 249034346 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 1016060021520 its reverse (251200606101), we get a palindrome (1267260627621).

The spelling of 1016060021520 in words is "one trillion, sixteen billion, sixty million, twenty-one thousand, five hundred twenty".