100020201001001 has 4 divisors (see below), whose sum is σ = 105903742236372. Its totient is φ = 94136659765632.

The previous prime is 100020201000991. The next prime is 100020201001111. The reversal of 100020201001001 is 100100102020001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88636594919401 + 11383606081600 = 9414701^2 + 3373960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100020201001001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100020201001001.

It is not an unprimeable number, because it can be changed into a prime (100020201021001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2941770617660 + ... + 2941770617693.

It is an arithmetic number, because the mean of its divisors is an integer number (26475935559093).

Almost surely, 2^{100020201001001} is an apocalyptic number.

It is an amenable number.

100020201001001 is a deficient number, since it is larger than the sum of its proper divisors (5883541235371).

100020201001001 is an equidigital number, since it uses as much as digits as its factorization.

100020201001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5883541235370.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 100020201001001 its reverse (100100102020001), we get a palindrome (200120303021002).

The spelling of 100020201001001 in words is "one hundred trillion, twenty billion, two hundred one million, one thousand, one".