12151214221220 has 24 divisors (see below), whose sum is σ = 25824990227904. Its totient is φ = 4801925619296.

The previous prime is 12151214221189. The next prime is 12151214221291. The reversal of 12151214221220 is 2212241215121.

It is a happy number.

12151214221220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12151214221220.

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, 3660002624 + ... + 3660005943.

It is an arithmetic number, because the mean of its divisors is an integer number (1076041259496).

Almost surely, 2^{12151214221220} is an apocalyptic number.

12151214221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12151214221220 is an abundant number, since it is smaller than the sum of its proper divisors (13673776006684).

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

12151214221220 is a wasteful number, since it uses less digits than its factorization.

12151214221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7320008659 (or 7320008657 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

Adding to 12151214221220 its reverse (2212241215121), we get a palindrome (14363455436341).

The spelling of 12151214221220 in words is "twelve trillion, one hundred fifty-one billion, two hundred fourteen million, two hundred twenty-one thousand, two hundred twenty".