12883691521 has 4 divisors (see below), whose sum is σ = 12892380592. Its totient is φ = 12875002452.

The previous prime is 12883691461. The next prime is 12883691563. The reversal of 12883691521 is 12519638821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12883691521 - 2⁷ = 12883691393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12883691581) 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, 4342311 + ... + 4345276.

It is an arithmetic number, because the mean of its divisors is an integer number (3223095148).

Almost surely, 2^12883691521 is an apocalyptic number.

It is an amenable number.

12883691521 is a deficient number, since it is larger than the sum of its proper divisors (8689071).

12883691521 is an equidigital number, since it uses as much as digits as its factorization.

12883691521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8689070.

The product of its digits is 207360, while the sum is 46.

The spelling of 12883691521 in words is "twelve billion, eight hundred eighty-three million, six hundred ninety-one thousand, five hundred twenty-one".