103020505521 has 8 divisors (see below), whose sum is σ = 137363779200. Its totient is φ = 68678784432.

The previous prime is 103020505507. The next prime is 103020505571. The reversal of 103020505521 is 125505020301.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-103020505521 is a prime.

It is a super-2 number, since 2×103020505521² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 103020505491 and 103020505500.

It is not an unprimeable number, because it can be changed into a prime (103020505571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223321 + ... + 505878.

It is an arithmetic number, because the mean of its divisors is an integer number (17170472400).

Almost surely, 2^103020505521 is an apocalyptic number.

It is an amenable number.

103020505521 is a deficient number, since it is larger than the sum of its proper divisors (34343273679).

103020505521 is an equidigital number, since it uses as much as digits as its factorization.

103020505521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776295.

The product of its (nonzero) digits is 1500, while the sum is 24.

Adding to 103020505521 its reverse (125505020301), we get a palindrome (228525525822).

The spelling of 103020505521 in words is "one hundred three billion, twenty million, five hundred five thousand, five hundred twenty-one".