121222112221120 has 112 divisors (see below), whose sum is σ = 289442067393600. Its totient is φ = 48357595054080.

The previous prime is 121222112221103. The next prime is 121222112221129. The reversal of 121222112221120 is 21122211222121.

It is a junction number, because it is equal to n+sod(n) for n = 121222112221091 and 121222112221100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222112221129) by changing a digit.

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, 328679376 + ... + 329047984.

Almost surely, 2^{121222112221120} is an apocalyptic number.

121222112221120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121222112221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144721033696800).

121222112221120 is an abundant number, since it is smaller than the sum of its proper divisors (168219955172480).

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

121222112221120 is a wasteful number, since it uses less digits than its factorization.

121222112221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371406 (or 371396 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 121222112221120 its reverse (21122211222121), we get a palindrome (142344323443241).

The spelling of 121222112221120 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twenty".