121224331202020 has 96 divisors (see below), whose sum is σ = 269632204773120. Its totient is φ = 45685997660160.

The previous prime is 121224331202003. The next prime is 121224331202021. The reversal of 121224331202020 is 20202133422121.

It is not an unprimeable number, because it can be changed into a prime (121224331202021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23182491 + ... + 27926269.

It is an arithmetic number, because the mean of its divisors is an integer number (2808668799720).

Almost surely, 2^{121224331202020} is an apocalyptic number.

121224331202020 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 121224331202020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134816102386560).

121224331202020 is an abundant number, since it is smaller than the sum of its proper divisors (148407873571100).

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

121224331202020 is a wasteful number, since it uses less digits than its factorization.

121224331202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4744645 (or 4744643 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 121224331202020 its reverse (20202133422121), we get a palindrome (141426464624141).

The spelling of 121224331202020 in words is "one hundred twenty-one trillion, two hundred twenty-four billion, three hundred thirty-one million, two hundred two thousand, twenty".