12100200100021 has 4 divisors (see below), whose sum is σ = 13200218290944. Its totient is φ = 11000181909100.

The previous prime is 12100200100003. The next prime is 12100200100039. The reversal of 12100200100021 is 12000100200121.

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 an interprime number because it is at equal distance from previous prime (12100200100003) and next prime (12100200100039).

It is a cyclic number.

It is not a de Polignac number, because 12100200100021 - 2³¹ = 12098052616373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12100200099980 and 12100200100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100200100421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550009095445 + ... + 550009095466.

It is an arithmetic number, because the mean of its divisors is an integer number (3300054572736).

Almost surely, 2^{12100200100021} is an apocalyptic number.

12100200100021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12100200100021 is a deficient number, since it is larger than the sum of its proper divisors (1100018190923).

12100200100021 is a wasteful number, since it uses less digits than its factorization.

12100200100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100018190922.

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

Adding to 12100200100021 its reverse (12000100200121), we get a palindrome (24100300300142).

It can be divided in two parts, 12100200 and 100021, that added together give a palindrome (12200221).

The spelling of 12100200100021 in words is "twelve trillion, one hundred billion, two hundred million, one hundred thousand, twenty-one".