1002020021012 has 24 divisors (see below), whose sum is σ = 1756820764776. Its totient is φ = 500071477248.

The previous prime is 1002020020957. The next prime is 1002020021021. The reversal of 1002020021012 is 2101200202001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 175691752336 + 826328268676 = 419156^2 + 909026^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1002020020984 and 1002020021002.

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, 18975398 + ... + 19028130.

It is an arithmetic number, because the mean of its divisors is an integer number (73200865199).

Almost surely, 2^{1002020021012} is an apocalyptic number.

It is an amenable number.

1002020021012 is a deficient number, since it is larger than the sum of its proper divisors (754800743764).

1002020021012 is a wasteful number, since it uses less digits than its factorization.

1002020021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61547 (or 61545 counting only the distinct ones).

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

Adding to 1002020021012 its reverse (2101200202001), we get a palindrome (3103220223013).

The spelling of 1002020021012 in words is "one trillion, two billion, twenty million, twenty-one thousand, twelve".