1001020202001 has 24 divisors (see below), whose sum is σ = 1446957233280. Its totient is φ = 666867387456.

The previous prime is 1001020201997. The next prime is 1001020202023. The reversal of 1001020202001 is 1002020201001.

It is not a de Polignac number, because 1001020202001 - 2² = 1001020201997 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 (1001020202041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105399085 + ... + 105408581.

It is an arithmetic number, because the mean of its divisors is an integer number (60289884720).

Almost surely, 2^{1001020202001} is an apocalyptic number.

It is an amenable number.

1001020202001 is a deficient number, since it is larger than the sum of its proper divisors (445937031279).

1001020202001 is a wasteful number, since it uses less digits than its factorization.

1001020202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16685 (or 16682 counting only the distinct ones).

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

Adding to 1001020202001 its reverse (1002020201001), we get a palindrome (2003040403002).

It can be divided in two parts, 1001020 and 202001, that added together give a palindrome (1203021).

The spelling of 1001020202001 in words is "one trillion, one billion, twenty million, two hundred two thousand, one".