100001002020001 has 2 divisors, whose sum is σ = 100001002020002. Its totient is φ = 100001002020000.

The previous prime is 100001002019999. The next prime is 100001002020113. The reversal of 100001002020001 is 100020200100001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61568739230625 + 38432262789376 = 7846575^2 + 6199376^2 .

It is a cyclic number.

It is not a de Polignac number, because 100001002020001 - 2¹ = 100001002019999 is a prime.

Together with 100001002019999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (100001002020301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000501010000 + 50000501010001.

It is an arithmetic number, because the mean of its divisors is an integer number (50000501010001).

Almost surely, 2^{100001002020001} is an apocalyptic number.

It is an amenable number.

100001002020001 is a deficient number, since it is larger than the sum of its proper divisors (1).

100001002020001 is an equidigital number, since it uses as much as digits as its factorization.

100001002020001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 100001002020001 its reverse (100020200100001), we get a palindrome (200021202120002).

The spelling of 100001002020001 in words is "one hundred trillion, one billion, two million, twenty thousand, one".