12206665242 has 24 divisors (see below), whose sum is σ = 26457530580. Its totient is φ = 4067387520.

The previous prime is 12206665231. The next prime is 12206665243. The reversal of 12206665242 is 24256660221.

It can be written as a sum of positive squares in 2 ways, for example, as 11474908641 + 731756601 = 107121^2 + 27051^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12206665197 and 12206665206.

It is not an unprimeable number, because it can be changed into a prime (12206665243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74367 + ... + 173042.

Almost surely, 2^12206665242 is an apocalyptic number.

12206665242 is an abundant number, since it is smaller than the sum of its proper divisors (14250865338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12206665242 is a wasteful number, since it uses less digits than its factorization.

12206665242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250158 (or 250155 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 12206665242 in words is "twelve billion, two hundred six million, six hundred sixty-five thousand, two hundred forty-two".