121221211224 has 64 divisors (see below), whose sum is σ = 313332876000. Its totient is φ = 39051085824.

The previous prime is 121221211159. The next prime is 121221211249. The reversal of 121221211224 is 422112122121.

It is a super-2 number, since 2×121221211224² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 121221211224.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325777 + ... + 590400.

Almost surely, 2^121221211224 is an apocalyptic number.

It is an amenable number.

121221211224 is an abundant number, since it is smaller than the sum of its proper divisors (192111664776).

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

121221211224 is a wasteful number, since it uses less digits than its factorization.

121221211224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916372 (or 916368 counting only the distinct ones).

The product of its digits is 256, while the sum is 21.

Adding to 121221211224 its reverse (422112122121), we get a palindrome (543333333345).

The spelling of 121221211224 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twenty-four".