12145243226 has 4 divisors (see below), whose sum is σ = 18217864842. Its totient is φ = 6072621612.

The previous prime is 12145243217. The next prime is 12145243237. The reversal of 12145243226 is 62234254121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10743115201 + 1402128025 = 103649^2 + 37445^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12145243192 and 12145243201.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3036310805 + ... + 3036310808.

Almost surely, 2^12145243226 is an apocalyptic number.

12145243226 is a deficient number, since it is larger than the sum of its proper divisors (6072621616).

12145243226 is an equidigital number, since it uses as much as digits as its factorization.

12145243226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072621615.

The product of its digits is 23040, while the sum is 32.

Adding to 12145243226 its reverse (62234254121), we get a palindrome (74379497347).

The spelling of 12145243226 in words is "twelve billion, one hundred forty-five million, two hundred forty-three thousand, two hundred twenty-six".