2200002000021 has 24 divisors (see below), whose sum is σ = 3631805835840. Its totient is φ = 1257124441536.

The previous prime is 2200002000017. The next prime is 2200002000037. The reversal of 2200002000021 is 1200002000022.

It is not a de Polignac number, because 2200002000021 - 2² = 2200002000017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2200001999967 and 2200002000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2200002000821) 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 23 ways as a sum of consecutive naturals, for example, 4458406 + ... + 4927208.

It is an arithmetic number, because the mean of its divisors is an integer number (151325243160).

Almost surely, 2^{2200002000021} is an apocalyptic number.

2200002000021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2200002000021 is a deficient number, since it is larger than the sum of its proper divisors (1431803835819).

2200002000021 is a wasteful number, since it uses less digits than its factorization.

2200002000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543305 (or 543302 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 2200002000021 its reverse (1200002000022), we get a palindrome (3400004000043).

Subtracting from 2200002000021 its reverse (1200002000022), we obtain a palindrome (999999999999).

The spelling of 2200002000021 in words is "two trillion, two hundred billion, two million, twenty-one", and thus it is an aban number.