1002001122020 has 96 divisors (see below), whose sum is σ = 2130303006720. Its totient is φ = 395866598400.

The previous prime is 1002001121987. The next prime is 1002001122079. The reversal of 1002001122020 is 202211002001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1002001121992 and 1002001122010.

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, 452778434 + ... + 452780646.

It is an arithmetic number, because the mean of its divisors is an integer number (22190656320).

Almost surely, 2^{1002001122020} is an apocalyptic number.

1002001122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002001122020 is an abundant number, since it is smaller than the sum of its proper divisors (1128301884700).

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

1002001122020 is a wasteful number, since it uses less digits than its factorization.

1002001122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165 (or 3163 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1002001122020 its reverse (202211002001), we get a palindrome (1204212124021).

The spelling of 1002001122020 in words is "one trillion, two billion, one million, one hundred twenty-two thousand, twenty".