200100211001021 has 4 divisors (see below), whose sum is σ = 200100239392092. Its totient is φ = 200100182609952.

The previous prime is 200100211000997. The next prime is 200100211001081. The reversal of 200100211001021 is 120100112001002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 166580684944996 + 33519526056025 = 12906614^2 + 5789605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200100211001021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200100211000993 and 200100211001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200100211001081) 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, 5314721 + ... + 20698953.

It is an arithmetic number, because the mean of its divisors is an integer number (50025059848023).

Almost surely, 2^{200100211001021} is an apocalyptic number.

It is an amenable number.

200100211001021 is a deficient number, since it is larger than the sum of its proper divisors (28391071).

200100211001021 is a wasteful number, since it uses less digits than its factorization.

200100211001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28391070.

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

Adding to 200100211001021 its reverse (120100112001002), we get a palindrome (320200323002023).

The spelling of 200100211001021 in words is "two hundred trillion, one hundred billion, two hundred eleven million, one thousand, twenty-one".