1021020120120 has 512 divisors, whose sum is σ = 4117300346880. Its totient is φ = 195618170880.

The previous prime is 1021020120101. The next prime is 1021020120143. The reversal of 1021020120120 is 210210201201.

1021020120120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1021020120096 and 1021020120105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 118073637 + ... + 118082283.

It is an arithmetic number, because the mean of its divisors is an integer number (8041602240).

Almost surely, 2^{1021020120120} is an apocalyptic number.

1021020120120 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 1021020120120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2058650173440).

1021020120120 is an abundant number, since it is smaller than the sum of its proper divisors (3096280226760).

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

1021020120120 is a wasteful number, since it uses less digits than its factorization.

1021020120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9675 (or 9671 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1021020120120 its reverse (210210201201), we get a palindrome (1231230321321).

The spelling of 1021020120120 in words is "one trillion, twenty-one billion, twenty million, one hundred twenty thousand, one hundred twenty".