100112020000021 has 4 divisors (see below), whose sum is σ = 100842764671692. Its totient is φ = 99381275328352.

The previous prime is 100112019999991. The next prime is 100112020000037. The reversal of 100112020000021 is 120000020211001.

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 24223268697796 + 75888751302225 = 4921714^2 + 8711415^2 .

It is a cyclic number.

It is not a de Polignac number, because 100112020000021 - 2²³ = 100112011611413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100112019999962 and 100112020000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100112020004021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365372335630 + ... + 365372335903.

It is an arithmetic number, because the mean of its divisors is an integer number (25210691167923).

Almost surely, 2^{100112020000021} is an apocalyptic number.

It is an amenable number.

100112020000021 is a deficient number, since it is larger than the sum of its proper divisors (730744671671).

100112020000021 is an equidigital number, since it uses as much as digits as its factorization.

100112020000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730744671670.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 100112020000021 its reverse (120000020211001), we get a palindrome (220112040211022).

The spelling of 100112020000021 in words is "one hundred trillion, one hundred twelve billion, twenty million, twenty-one", and thus it is an aban number.