21121220000210 has 16 divisors (see below), whose sum is σ = 41474395636992. Its totient is φ = 7680443636400.

The previous prime is 21121220000171. The next prime is 21121220000227. The reversal of 21121220000210 is 1200002212112.

It is a super-2 number, since 2×21121220000210² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 96005545346 + ... + 96005545565.

It is an arithmetic number, because the mean of its divisors is an integer number (2592149727312).

Almost surely, 2^{21121220000210} is an apocalyptic number.

21121220000210 is a deficient number, since it is larger than the sum of its proper divisors (20353175636782).

21121220000210 is a wasteful number, since it uses less digits than its factorization.

21121220000210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192011090929.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21121220000210 its reverse (1200002212112), we get a palindrome (22321222212322).

The spelling of 21121220000210 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, two hundred ten", and thus it is an aban number.