12053520521 has 8 divisors (see below), whose sum is σ = 13782713664. Its totient is φ = 10326142800.

The previous prime is 12053520469. The next prime is 12053520541. The reversal of 12053520521 is 12502535021.

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

It is a cyclic number.

It is not a de Polignac number, because 12053520521 - 2²² = 12049326217 is a prime.

It is a super-2 number, since 2×12053520521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12053520541) 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, 439595 + ... + 466208.

It is an arithmetic number, because the mean of its divisors is an integer number (1722839208).

Almost surely, 2^12053520521 is an apocalyptic number.

It is an amenable number.

12053520521 is a deficient number, since it is larger than the sum of its proper divisors (1729193143).

12053520521 is an equidigital number, since it uses as much as digits as its factorization.

12053520521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907711.

The product of its (nonzero) digits is 3000, while the sum is 26.

The spelling of 12053520521 in words is "twelve billion, fifty-three million, five hundred twenty thousand, five hundred twenty-one".