21120210200221 has 8 divisors (see below), whose sum is σ = 23040310997088. Its totient is φ = 19200123018000.

The previous prime is 21120210200209. The next prime is 21120210200227. The reversal of 21120210200221 is 12200201202112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21120210200221 - 2¹⁹ = 21120209675933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21120210200195 and 21120210200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120210200227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13215 + ... + 6499276.

It is an arithmetic number, because the mean of its divisors is an integer number (2880038874636).

Almost surely, 2^{21120210200221} is an apocalyptic number.

It is an amenable number.

21120210200221 is a deficient number, since it is larger than the sum of its proper divisors (1920100796867).

21120210200221 is a wasteful number, since it uses less digits than its factorization.

21120210200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6807323.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21120210200221 its reverse (12200201202112), we get a palindrome (33320411402333).

The spelling of 21120210200221 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, two hundred thousand, two hundred twenty-one".