2200002100021 has 4 divisors (see below), whose sum is σ = 2400002290944. Its totient is φ = 2000001909100.

The previous prime is 2200002100001. The next prime is 2200002100069. The reversal of 2200002100021 is 1200012000022.

2200002100021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2200002100021 - 2¹¹ = 2200002097973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2200002099980 and 2200002100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2200002100001) 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, 100000095445 + ... + 100000095466.

It is an arithmetic number, because the mean of its divisors is an integer number (600000572736).

Almost surely, 2^{2200002100021} is an apocalyptic number.

It is an amenable number.

2200002100021 is a deficient number, since it is larger than the sum of its proper divisors (200000190923).

2200002100021 is a wasteful number, since it uses less digits than its factorization.

2200002100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200000190922.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2200002100021 its reverse (1200012000022), we get a palindrome (3400014100043).

Subtracting from 2200002100021 its reverse (1200012000022), we obtain a palindrome (999990099999).

The spelling of 2200002100021 in words is "two trillion, two hundred billion, two million, one hundred thousand, twenty-one".