1002010001000 has 128 divisors (see below), whose sum is σ = 2427021792000. Its totient is φ = 386749216000.

The previous prime is 1002010000973. The next prime is 1002010001077. The reversal of 1002010001000 is 1000102001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52509461 + ... + 52528539.

It is an arithmetic number, because the mean of its divisors is an integer number (18961107750).

Almost surely, 2^{1002010001000} is an apocalyptic number.

1002010001000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1002010001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1213510896000).

1002010001000 is an abundant number, since it is smaller than the sum of its proper divisors (1425011791000).

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

1002010001000 is a wasteful number, since it uses less digits than its factorization.

1002010001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20940 (or 20926 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 1002010001000 its reverse (1000102001), we get a palindrome (1003010103001).

The spelling of 1002010001000 in words is "one trillion, two billion, ten million, one thousand".