1002002221020 has 24 divisors (see below), whose sum is σ = 2805606219024. Its totient is φ = 267200592256.

The previous prime is 1002002220997. The next prime is 1002002221049. The reversal of 1002002221020 is 201222002001.

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 = 1002002220987 and 1002002221005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8350018449 + ... + 8350018568.

It is an arithmetic number, because the mean of its divisors is an integer number (116900259126).

Almost surely, 2^{1002002221020} is an apocalyptic number.

1002002221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002002221020 is an abundant number, since it is smaller than the sum of its proper divisors (1803603998004).

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

1002002221020 is a wasteful number, since it uses less digits than its factorization.

1002002221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16700037029 (or 16700037027 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1002002221020 its reverse (201222002001), we get a palindrome (1203224223021).

The spelling of 1002002221020 in words is "one trillion, two billion, two million, two hundred twenty-one thousand, twenty".