21022120200109 has 4 divisors (see below), whose sum is σ = 24025280228704. Its totient is φ = 18018960171516.

The previous prime is 21022120200073. The next prime is 21022120200121. The reversal of 21022120200109 is 90100202122012.

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 21022120200109 - 2¹¹ = 21022120198061 is a prime.

It is a super-2 number, since 2×21022120200109² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21022120200109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022120200199) 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, 1501580014287 + ... + 1501580014300.

It is an arithmetic number, because the mean of its divisors is an integer number (6006320057176).

Almost surely, 2^{21022120200109} is an apocalyptic number.

It is an amenable number.

21022120200109 is a deficient number, since it is larger than the sum of its proper divisors (3003160028595).

21022120200109 is an equidigital number, since it uses as much as digits as its factorization.

21022120200109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003160028594.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 21022120200109 in words is "twenty-one trillion, twenty-two billion, one hundred twenty million, two hundred thousand, one hundred nine".