200100121010021 has 4 divisors (see below), whose sum is σ = 200104941928032. Its totient is φ = 200095300092012.

The previous prime is 200100121009967. The next prime is 200100121010039. The reversal of 200100121010021 is 120010121001002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 200100121010021 - 2¹⁴ = 200100120993637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200100121009984 and 200100121010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200100121010081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2410396745 + ... + 2410479758.

It is an arithmetic number, because the mean of its divisors is an integer number (50026235482008).

Almost surely, 2^{200100121010021} is an apocalyptic number.

It is an amenable number.

200100121010021 is a deficient number, since it is larger than the sum of its proper divisors (4820918011).

200100121010021 is an equidigital number, since it uses as much as digits as its factorization.

200100121010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4820918010.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 200100121010021 its reverse (120010121001002), we get a palindrome (320110242011023).

The spelling of 200100121010021 in words is "two hundred trillion, one hundred billion, one hundred twenty-one million, ten thousand, twenty-one".