12221121120 has 96 divisors (see below), whose sum is σ = 41457824352. Its totient is φ = 3008274432.

The previous prime is 12221121079. The next prime is 12221121161. The reversal of 12221121120 is 2112112221.

It is an interprime number because it is at equal distance from previous prime (12221121079) and next prime (12221121161).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12221121120.

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, 973017 + ... + 985496.

It is an arithmetic number, because the mean of its divisors is an integer number (431852337).

Almost surely, 2^12221121120 is an apocalyptic number.

12221121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221121120 is an abundant number, since it is smaller than the sum of its proper divisors (29236703232).

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

12221121120 is a wasteful number, since it uses less digits than its factorization.

12221121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958544 (or 1958536 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12221121120 its reverse (2112112221), we get a palindrome (14333233341).

The spelling of 12221121120 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty".