12221213123240 has 64 divisors (see below), whose sum is σ = 30695139984960. Its totient is φ = 4340726853120.

The previous prime is 12221213123237. The next prime is 12221213123279. The reversal of 12221213123240 is 4232131212221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322951829 + ... + 322989668.

It is an arithmetic number, because the mean of its divisors is an integer number (479611562265).

Almost surely, 2^{12221213123240} is an apocalyptic number.

12221213123240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221213123240 is an abundant number, since it is smaller than the sum of its proper divisors (18473926861720).

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

12221213123240 is a wasteful number, since it uses less digits than its factorization.

12221213123240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645941562 (or 645941558 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 12221213123240 its reverse (4232131212221), we get a palindrome (16453344335461).

The spelling of 12221213123240 in words is "twelve trillion, two hundred twenty-one billion, two hundred thirteen million, one hundred twenty-three thousand, two hundred forty".