12206524021 has 4 divisors (see below), whose sum is σ = 12210881632. Its totient is φ = 12202166412.

The previous prime is 12206524013. The next prime is 12206524123. The reversal of 12206524021 is 12042560221.

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 12206524021 - 2³ = 12206524013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12206504021) 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, 2174601 + ... + 2180206.

It is an arithmetic number, because the mean of its divisors is an integer number (3052720408).

Almost surely, 2^12206524021 is an apocalyptic number.

It is an amenable number.

12206524021 is a deficient number, since it is larger than the sum of its proper divisors (4357611).

12206524021 is an equidigital number, since it uses as much as digits as its factorization.

12206524021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4357610.

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 12206524021 in words is "twelve billion, two hundred six million, five hundred twenty-four thousand, twenty-one".