100021201001 has 2 divisors, whose sum is σ = 100021201002. Its totient is φ = 100021201000.

The previous prime is 100021200989. The next prime is 100021201019. The reversal of 100021201001 is 100102120001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93912215401 + 6108985600 = 306451^2 + 78160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100021201001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100021201001.

It is not a weakly prime, because it can be changed into another prime (100021201031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010600500 + 50010600501.

It is an arithmetic number, because the mean of its divisors is an integer number (50010600501).

Almost surely, 2^100021201001 is an apocalyptic number.

It is an amenable number.

100021201001 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021201001 is an equidigital number, since it uses as much as digits as its factorization.

100021201001 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 8.

Adding to 100021201001 its reverse (100102120001), we get a palindrome (200123321002).

The spelling of 100021201001 in words is "one hundred billion, twenty-one million, two hundred one thousand, one".