21002221120010 has 32 divisors (see below), whose sum is σ = 41704973431632. Its totient is φ = 7565528056320.

The previous prime is 21002221119983. The next prime is 21002221120019. The reversal of 21002221120010 is 1002112220012.

It can be written as a sum of positive squares in 8 ways, for example, as 164940764641 + 20837280355369 = 406129^2 + 4564787^2 .

It is not an unprimeable number, because it can be changed into a prime (21002221120019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1970184269 + ... + 1970194928.

Almost surely, 2^{21002221120010} is an apocalyptic number.

21002221120010 is a deficient number, since it is larger than the sum of its proper divisors (20702752311622).

21002221120010 is a wasteful number, since it uses less digits than its factorization.

21002221120010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3940379258.

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

Adding to 21002221120010 its reverse (1002112220012), we get a palindrome (22004333340022).

The spelling of 21002221120010 in words is "twenty-one trillion, two billion, two hundred twenty-one million, one hundred twenty thousand, ten".