12246299521 has 4 divisors (see below), whose sum is σ = 12258758592. Its totient is φ = 12233840452.

The previous prime is 12246299459. The next prime is 12246299573. The reversal of 12246299521 is 12599264221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12599264221 = 317 ⋅39745313.

It is a cyclic number.

It is not a de Polignac number, because 12246299521 - 2¹⁹ = 12245775233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12246296521) 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, 6228061 + ... + 6230026.

It is an arithmetic number, because the mean of its divisors is an integer number (3064689648).

Almost surely, 2^12246299521 is an apocalyptic number.

It is an amenable number.

12246299521 is a deficient number, since it is larger than the sum of its proper divisors (12459071).

12246299521 is an equidigital number, since it uses as much as digits as its factorization.

12246299521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12459070.

The product of its digits is 155520, while the sum is 43.

The spelling of 12246299521 in words is "twelve billion, two hundred forty-six million, two hundred ninety-nine thousand, five hundred twenty-one".