12153014521 has 4 divisors (see below), whose sum is σ = 12154203252. Its totient is φ = 12151825792.

The previous prime is 12153014507. The next prime is 12153014563. The reversal of 12153014521 is 12541035121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12541035121 = 8219 ⋅1525859.

It can be written as a sum of positive squares in 2 ways, for example, as 3286155625 + 8866858896 = 57325^2 + 94164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12153014521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12153014591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578896 + ... + 599521.

It is an arithmetic number, because the mean of its divisors is an integer number (3038550813).

Almost surely, 2^12153014521 is an apocalyptic number.

It is an amenable number.

12153014521 is a deficient number, since it is larger than the sum of its proper divisors (1188731).

12153014521 is a wasteful number, since it uses less digits than its factorization.

12153014521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188730.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 12153014521 its reverse (12541035121), we get a palindrome (24694049642).

The spelling of 12153014521 in words is "twelve billion, one hundred fifty-three million, fourteen thousand, five hundred twenty-one".