100000020101 has 4 divisors (see below), whose sum is σ = 100002445452. Its totient is φ = 99997594752.

The previous prime is 100000020083. The next prime is 100000020137. The reversal of 100000020101 is 101020000001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101020000001 = 293 ⋅344778157.

It can be written as a sum of positive squares in 2 ways, for example, as 35194135201 + 64805884900 = 187601^2 + 254570^2 .

It is a cyclic number.

It is not a de Polignac number, because 100000020101 - 2²⁶ = 99932911237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100000020151) 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 in 3 ways as a sum of consecutive naturals, for example, 1149740 + ... + 1233653.

It is an arithmetic number, because the mean of its divisors is an integer number (25000611363).

Almost surely, 2^100000020101 is an apocalyptic number.

It is an amenable number.

100000020101 is a deficient number, since it is larger than the sum of its proper divisors (2425351).

100000020101 is an equidigital number, since it uses as much as digits as its factorization.

100000020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425350.

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 100000020101 its reverse (101020000001), we get a palindrome (201020020102).

The spelling of 100000020101 in words is "one hundred billion, twenty thousand, one hundred one".