21002122020010 has 32 divisors (see below), whose sum is σ = 38082998283840. Its totient is φ = 8338819539072.

The previous prime is 21002122019999. The next prime is 21002122020013. The reversal of 21002122020010 is 1002022120012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21002122020013) by changing a digit.

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, 15611881 + ... + 16903699.

It is an arithmetic number, because the mean of its divisors is an integer number (1190093696370).

Almost surely, 2^{21002122020010} is an apocalyptic number.

21002122020010 is a deficient number, since it is larger than the sum of its proper divisors (17080876263830).

21002122020010 is a wasteful number, since it uses less digits than its factorization.

21002122020010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303830.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21002122020010 its reverse (1002022120012), we get a palindrome (22004144140022).

The spelling of 21002122020010 in words is "twenty-one trillion, two billion, one hundred twenty-two million, twenty thousand, ten".