1001021000001 has 16 divisors (see below), whose sum is σ = 1456049906688. Its totient is φ = 606671326800.

The previous prime is 1001020999897. The next prime is 1001021000009. The reversal of 1001021000001 is 1000001201001.

It is a de Polignac number, because none of the positive numbers 2^k-1001021000001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001021000009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3148020 + ... + 3451386.

It is an arithmetic number, because the mean of its divisors is an integer number (91003119168).

Almost surely, 2^{1001021000001} is an apocalyptic number.

1001021000001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1001021000001 is a deficient number, since it is larger than the sum of its proper divisors (455028906687).

1001021000001 is a wasteful number, since it uses less digits than its factorization.

1001021000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403372.

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 1001021000001 its reverse (1000001201001), we get a palindrome (2001022201002).

The spelling of 1001021000001 in words is "one trillion, one billion, twenty-one million, one", and thus it is an aban number and an uban number.