10021021002 has 64 divisors (see below), whose sum is σ = 24197222400. Its totient is φ = 3062441520.

The previous prime is 10021021001. The next prime is 10021021007. The reversal of 10021021002 is 20012012001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (10021021001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125728 + ... + 189339.

It is an arithmetic number, because the mean of its divisors is an integer number (378081600).

Almost surely, 2^10021021002 is an apocalyptic number.

10021021002 is an abundant number, since it is smaller than the sum of its proper divisors (14176201398).

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

10021021002 is a wasteful number, since it uses less digits than its factorization.

10021021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315128 (or 315122 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10021021002 its reverse (20012012001), we get a palindrome (30033033003).

Subtracting 10021021002 from its reverse (20012012001), we obtain a palindrome (9990990999).

The spelling of 10021021002 in words is "ten billion, twenty-one million, twenty-one thousand, two".