1001020021002 has 24 divisors (see below), whose sum is σ = 2168913732960. Its totient is φ = 333667644840.

The previous prime is 1001020020937. The next prime is 1001020021013. The reversal of 1001020021002 is 2001200201001.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 685899 + ... + 1572417.

It is an arithmetic number, because the mean of its divisors is an integer number (90371405540).

Almost surely, 2^{1001020021002} is an apocalyptic number.

1001020021002 is an abundant number, since it is smaller than the sum of its proper divisors (1167893711958).

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

1001020021002 is a wasteful number, since it uses less digits than its factorization.

1001020021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949258 (or 949255 counting only the distinct ones).

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

Adding to 1001020021002 its reverse (2001200201001), we get a palindrome (3002220222003).

The spelling of 1001020021002 in words is "one trillion, one billion, twenty million, twenty-one thousand, two".