1020021330120 has 128 divisors (see below), whose sum is σ = 3295714141440. Its totient is φ = 251062318080.

The previous prime is 1020021330113. The next prime is 1020021330143. The reversal of 1020021330120 is 210331200201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1020021330120.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34362885 + ... + 34392555.

It is an arithmetic number, because the mean of its divisors is an integer number (25747766730).

Almost surely, 2^{1020021330120} is an apocalyptic number.

1020021330120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020021330120 is an abundant number, since it is smaller than the sum of its proper divisors (2275692811320).

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

1020021330120 is a wasteful number, since it uses less digits than its factorization.

1020021330120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51735 (or 51731 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1020021330120 its reverse (210331200201), we get a palindrome (1230352530321).

The spelling of 1020021330120 in words is "one trillion, twenty billion, twenty-one million, three hundred thirty thousand, one hundred twenty".