1000202120001 has 28 divisors (see below), whose sum is σ = 1713848203392. Its totient is φ = 571544065656.

The previous prime is 1000202119999. The next prime is 1000202120063. The reversal of 1000202120001 is 1000212020001.

It is not a de Polignac number, because 1000202120001 - 2¹ = 1000202119999 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1000202140001) by changing a digit.

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 27 ways as a sum of consecutive naturals, for example, 97996281 + ... + 98006486.

Almost surely, 2^{1000202120001} is an apocalyptic number.

It is an amenable number.

1000202120001 is a deficient number, since it is larger than the sum of its proper divisors (713646083391).

1000202120001 is an frugal number, since it uses more digits than its factorization.

1000202120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196002792 (or 196002777 counting only the distinct ones).

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

Adding to 1000202120001 its reverse (1000212020001), we get a palindrome (2000414140002).

The spelling of 1000202120001 in words is "one trillion, two hundred two million, one hundred twenty thousand, one".