12103020541521 has 48 divisors (see below), whose sum is σ = 21516887392000. Its totient is φ = 6383890247040.

The previous prime is 12103020541487. The next prime is 12103020541537. The reversal of 12103020541521 is 12514502030121.

It is a happy number.

12103020541521 is a `hidden beast` number, since 1 + 2 + 10 + 30 + 205 + 415 + 2 + 1 = 666.

12103020541521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12103020541521 - 2¹⁰ = 12103020540497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12103020541321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58044111 + ... + 58252251.

Almost surely, 2^{12103020541521} is an apocalyptic number.

It is an amenable number.

12103020541521 is a deficient number, since it is larger than the sum of its proper divisors (9413866850479).

12103020541521 is a wasteful number, since it uses less digits than its factorization.

12103020541521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279166 (or 279163 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 12103020541521 its reverse (12514502030121), we get a palindrome (24617522571642).

The spelling of 12103020541521 in words is "twelve trillion, one hundred three billion, twenty million, five hundred forty-one thousand, five hundred twenty-one".