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21200200211 = 47653444887
BaseRepresentation
bin10011101111101000…
…010110001000010011
32000201110220202102102
4103233220112020103
5321404222401321
613423401511015
71350234504611
oct235750261023
960643822372
1021200200211
118a99a62223
124137aa246b
131ccb23c288
1410518686b1
158412e5c0b
hex4efa16213

21200200211 has 4 divisors (see below), whose sum is σ = 21200692752. Its totient is φ = 21199707672.

The previous prime is 21200200207. The next prime is 21200200243. The reversal of 21200200211 is 11200200212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21200200211 - 22 = 21200200207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21200200192 and 21200200201.

It is not an unprimeable number, because it can be changed into a prime (21200200201) 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, 174791 + ... + 270096.

It is an arithmetic number, because the mean of its divisors is an integer number (5300173188).

Almost surely, 221200200211 is an apocalyptic number.

21200200211 is a deficient number, since it is larger than the sum of its proper divisors (492541).

21200200211 is an equidigital number, since it uses as much as digits as its factorization.

21200200211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492540.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21200200211 its reverse (11200200212), we get a palindrome (32400400423).

Subtracting from 21200200211 its reverse (11200200212), we obtain a palindrome (9999999999).

The spelling of 21200200211 in words is "twenty-one billion, two hundred million, two hundred thousand, two hundred eleven".

Divisors: 1 47653 444887 21200200211