121220123020 has 12 divisors (see below), whose sum is σ = 254562258384. Its totient is φ = 48488049200.

The previous prime is 121220122999. The next prime is 121220123021. The reversal of 121220123020 is 20321022121.

It is a happy number.

121220123020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 121220122985 and 121220123003.

It is not an unprimeable number, because it can be changed into a prime (121220123021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030503056 + ... + 3030503095.

It is an arithmetic number, because the mean of its divisors is an integer number (21213521532).

Almost surely, 2^121220123020 is an apocalyptic number.

121220123020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220123020 is an abundant number, since it is smaller than the sum of its proper divisors (133342135364).

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

121220123020 is a wasteful number, since it uses less digits than its factorization.

121220123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061006160 (or 6061006158 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 121220123020 its reverse (20321022121), we get a palindrome (141541145141).

The spelling of 121220123020 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twenty-three thousand, twenty".