21121330332210 has 32 divisors (see below), whose sum is σ = 50691997020672. Its totient is φ = 5632265397120.

The previous prime is 21121330332163. The next prime is 21121330332229. The reversal of 21121330332210 is 1223303312112.

It is a super-2 number, since 2×21121330332210² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3651459 + ... + 7454918.

It is an arithmetic number, because the mean of its divisors is an integer number (1584124906896).

Almost surely, 2^{21121330332210} is an apocalyptic number.

21121330332210 is an abundant number, since it is smaller than the sum of its proper divisors (29570666688462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21121330332210 is a wasteful number, since it uses less digits than its factorization.

21121330332210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11169778.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21121330332210 its reverse (1223303312112), we get a palindrome (22344633644322).

The spelling of 21121330332210 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred thirty million, three hundred thirty-two thousand, two hundred ten".