12106220242 has 8 divisors (see below), whose sum is σ = 18161800956. Its totient is φ = 6052286592.

The previous prime is 12106220237. The next prime is 12106220249. The reversal of 12106220242 is 24202260121.

It can be written as a sum of positive squares in 2 ways, for example, as 10235571241 + 1870649001 = 101171^2 + 43251^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12106220249) 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, 393223 + ... + 422890.

Almost surely, 2^12106220242 is an apocalyptic number.

12106220242 is a deficient number, since it is larger than the sum of its proper divisors (6055580714).

12106220242 is an equidigital number, since it uses as much as digits as its factorization.

12106220242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823532.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 12106220242 its reverse (24202260121), we get a palindrome (36308480363).

The spelling of 12106220242 in words is "twelve billion, one hundred six million, two hundred twenty thousand, two hundred forty-two".