121220120102020 has 24 divisors (see below), whose sum is σ = 254562489010368. Its totient is φ = 48488002936800.

The previous prime is 121220120101999. The next prime is 121220120102027. The reversal of 121220120102020 is 20201021022121.

It is a happy number.

121220120102020 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 = 121220120101985 and 121220120102003.

It is not an unprimeable number, because it can be changed into a prime (121220120102027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26819305 + ... + 31011535.

It is an arithmetic number, because the mean of its divisors is an integer number (10606770375432).

Almost surely, 2^{121220120102020} is an apocalyptic number.

121220120102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220120102020 is an abundant number, since it is smaller than the sum of its proper divisors (133342368908348).

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

121220120102020 is a wasteful number, since it uses less digits than its factorization.

121220120102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5638011 (or 5638009 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121220120102020 its reverse (20201021022121), we get a palindrome (141421141124141).

The spelling of 121220120102020 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty million, one hundred two thousand, twenty".