1002020102001 has 12 divisors (see below), whose sum is σ = 1458758925312. Its totient is φ = 662753452536.

The previous prime is 1002020101987. The next prime is 1002020102021. The reversal of 1002020102001 is 1002010202001.

It is not a de Polignac number, because 1002020102001 - 2⁵ = 1002020101969 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1002020102021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 438327861 + ... + 438330146.

It is an arithmetic number, because the mean of its divisors is an integer number (121563243776).

Almost surely, 2^{1002020102001} is an apocalyptic number.

It is an amenable number.

1002020102001 is a deficient number, since it is larger than the sum of its proper divisors (456738823311).

1002020102001 is a wasteful number, since it uses less digits than its factorization.

1002020102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876658140 (or 876658137 counting only the distinct ones).

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

Adding to 1002020102001 its reverse (1002010202001), we get a palindrome (2004030304002).

The spelling of 1002020102001 in words is "one trillion, two billion, twenty million, one hundred two thousand, one".