1002021021008 has 60 divisors (see below), whose sum is σ = 2280741955092. Its totient is φ = 425185689600.

The previous prime is 1002021021007. The next prime is 1002021021031. The reversal of 1002021021008 is 8001201202001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 876642709264 + 125378311744 = 936292^2 + 354088^2 .

It is a super-2 number, since 2×1002021021008² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002021021007) 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 11 ways as a sum of consecutive naturals, for example, 6247985 + ... + 6406352.

Almost surely, 2^{1002021021008} is an apocalyptic number.

It is an amenable number.

1002021021008 is an abundant number, since it is smaller than the sum of its proper divisors (1278720934084).

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

1002021021008 is a wasteful number, since it uses less digits than its factorization.

1002021021008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12654460 (or 12654447 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1002021021008 its reverse (8001201202001), we get a palindrome (9003222223009).

The spelling of 1002021021008 in words is "one trillion, two billion, twenty-one million, twenty-one thousand, eight".