12355221315 has 32 divisors (see below), whose sum is σ = 19979721216. Its totient is φ = 6519121920.

The previous prime is 12355221313. The next prime is 12355221317. The reversal of 12355221315 is 51312255321.

It is an interprime number because it is at equal distance from previous prime (12355221313) and next prime (12355221317).

It is not a de Polignac number, because 12355221315 - 2¹ = 12355221313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12355221313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1876980 + ... + 1883550.

It is an arithmetic number, because the mean of its divisors is an integer number (624366288).

Almost surely, 2^12355221315 is an apocalyptic number.

12355221315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12355221315 is a deficient number, since it is larger than the sum of its proper divisors (7624499901).

12355221315 is a wasteful number, since it uses less digits than its factorization.

12355221315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7899.

The product of its digits is 9000, while the sum is 30.

Adding to 12355221315 its reverse (51312255321), we get a palindrome (63667476636).

The spelling of 12355221315 in words is "twelve billion, three hundred fifty-five million, two hundred twenty-one thousand, three hundred fifteen".