12155222310515 has 8 divisors (see below), whose sum is σ = 14586324564240. Its totient is φ = 9724139320672.

The previous prime is 12155222310457. The next prime is 12155222310577. The reversal of 12155222310515 is 51501322255121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12155222310515 - 2²⁸ = 12154953875059 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3389384 + ... + 5983173.

It is an arithmetic number, because the mean of its divisors is an integer number (1823290570530).

Almost surely, 2^{12155222310515} is an apocalyptic number.

12155222310515 is a deficient number, since it is larger than the sum of its proper divisors (2431102253725).

12155222310515 is an equidigital number, since it uses as much as digits as its factorization.

12155222310515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9631941.

The product of its (nonzero) digits is 30000, while the sum is 35.

Adding to 12155222310515 its reverse (51501322255121), we get a palindrome (63656544565636).

The spelling of 12155222310515 in words is "twelve trillion, one hundred fifty-five billion, two hundred twenty-two million, three hundred ten thousand, five hundred fifteen".