12511315222 has 8 divisors (see below), whose sum is σ = 21447968976. Its totient is φ = 5361992232.

The previous prime is 12511315199. The next prime is 12511315261. The reversal of 12511315222 is 22251311521.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446832673 + ... + 446832700.

It is an arithmetic number, because the mean of its divisors is an integer number (2680996122).

Almost surely, 2^12511315222 is an apocalyptic number.

12511315222 is a deficient number, since it is larger than the sum of its proper divisors (8936653754).

12511315222 is an equidigital number, since it uses as much as digits as its factorization.

12511315222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893665382.

The product of its digits is 1200, while the sum is 25.

Adding to 12511315222 its reverse (22251311521), we get a palindrome (34762626743).

The spelling of 12511315222 in words is "twelve billion, five hundred eleven million, three hundred fifteen thousand, two hundred twenty-two".