121220130021020 has 48 divisors (see below), whose sum is σ = 256252344054336. Its totient is φ = 48166144320000.

The previous prime is 121220130020909. The next prime is 121220130021043. The reversal of 121220130021020 is 20120031022121.

121220130021020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 121220130021020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203495210 + ... + 204090030.

It is an arithmetic number, because the mean of its divisors is an integer number (5338590501132).

Almost surely, 2^{121220130021020} is an apocalyptic number.

121220130021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220130021020 is an abundant number, since it is smaller than the sum of its proper divisors (135032214033316).

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

121220130021020 is a wasteful number, since it uses less digits than its factorization.

121220130021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662462 (or 662460 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121220130021020 its reverse (20120031022121), we get a palindrome (141340161043141).

The spelling of 121220130021020 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred thirty million, twenty-one thousand, twenty".