12211554243120 has 80 divisors (see below), whose sum is σ = 37859695773792. Its totient is φ = 3256080906240.

The previous prime is 12211554243113. The next prime is 12211554243139. The reversal of 12211554243120 is 2134245511221.

It is a tau number, because it is divible by the number of its divisors (80).

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, 253597 + ... + 4948476.

Almost surely, 2^{12211554243120} is an apocalyptic number.

12211554243120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211554243120 is an abundant number, since it is smaller than the sum of its proper divisors (25648141530672).

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

12211554243120 is a wasteful number, since it uses less digits than its factorization.

12211554243120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5211870 (or 5211864 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 12211554243120 its reverse (2134245511221), we get a palindrome (14345799754341).

The spelling of 12211554243120 in words is "twelve trillion, two hundred eleven billion, five hundred fifty-four million, two hundred forty-three thousand, one hundred twenty".