12155222310516 has 48 divisors (see below), whose sum is σ = 31515321801600. Its totient is φ = 4051511594496.

The previous prime is 12155222310457. The next prime is 12155222310577. The reversal of 12155222310516 is 61501322255121.

12155222310516 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 522 + 23 + 105 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1259400 + ... + 5088863.

It is an arithmetic number, because the mean of its divisors is an integer number (656569204200).

Almost surely, 2^{12155222310516} is an apocalyptic number.

It is an amenable number.

12155222310516 is an abundant number, since it is smaller than the sum of its proper divisors (19360099491084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12155222310516 is a wasteful number, since it uses less digits than its factorization.

12155222310516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6366005 (or 6365997 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

Adding to 12155222310516 its reverse (61501322255121), we get a palindrome (73656544565637).

The spelling of 12155222310516 in words is "twelve trillion, one hundred fifty-five billion, two hundred twenty-two million, three hundred ten thousand, five hundred sixteen".