121221130224 has 40 divisors (see below), whose sum is σ = 313540820992. Its totient is φ = 40357206720.

The previous prime is 121221130211. The next prime is 121221130297. The reversal of 121221130224 is 422031122121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121221130224.

It is a congruent number.

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, 1518064 + ... + 1595919.

Almost surely, 2^121221130224 is an apocalyptic number.

It is an amenable number.

121221130224 is an abundant number, since it is smaller than the sum of its proper divisors (192319690768).

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

121221130224 is a wasteful number, since it uses less digits than its factorization.

121221130224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114805 (or 3114799 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 121221130224 its reverse (422031122121), we get a palindrome (543252252345).

The spelling of 121221130224 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred thirty thousand, two hundred twenty-four".