2121121224420 has 192 divisors, whose sum is σ = 7004392012800. Its totient is φ = 473981207040.

The previous prime is 2121121224389. The next prime is 2121121224463. The reversal of 2121121224420 is 244221211212.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1821810 + ... + 2749769.

It is an arithmetic number, because the mean of its divisors is an integer number (36481208400).

Almost surely, 2^{2121121224420} is an apocalyptic number.

2121121224420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121121224420 is an abundant number, since it is smaller than the sum of its proper divisors (4883270788380).

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

2121121224420 is a wasteful number, since it uses less digits than its factorization.

2121121224420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571658 (or 4571656 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 2121121224420 its reverse (244221211212), we get a palindrome (2365342435632).

The spelling of 2121121224420 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-four thousand, four hundred twenty".