12505511222 has 8 divisors (see below), whose sum is σ = 18778681200. Its totient is φ = 6245950824.

The previous prime is 12505511191. The next prime is 12505511251. The reversal of 12505511222 is 22211550521.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 12505511191 and 12505511200.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 3400097 + ... + 3403772.

It is an arithmetic number, because the mean of its divisors is an integer number (2347335150).

Almost surely, 2^12505511222 is an apocalyptic number.

12505511222 is a deficient number, since it is larger than the sum of its proper divisors (6273169978).

12505511222 is an equidigital number, since it uses as much as digits as its factorization.

12505511222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6804790.

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 12505511222 in words is "twelve billion, five hundred five million, five hundred eleven thousand, two hundred twenty-two".