1001020120120 has 96 divisors (see below), whose sum is σ = 2403787978800. Its totient is φ = 375071279616.

The previous prime is 1001020119943. The next prime is 1001020120123. The reversal of 1001020120120 is 210210201001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1001020120097 and 1001020120106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001020120123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 895707 + ... + 1674613.

Almost surely, 2^{1001020120120} is an apocalyptic number.

1001020120120 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 1001020120120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1201893989400).

1001020120120 is an abundant number, since it is smaller than the sum of its proper divisors (1402767858680).

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

1001020120120 is a wasteful number, since it uses less digits than its factorization.

1001020120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779045 (or 779022 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1001020120120 its reverse (210210201001), we get a palindrome (1211230321121).

The spelling of 1001020120120 in words is "one trillion, one billion, twenty million, one hundred twenty thousand, one hundred twenty".