21003003120210 has 32 divisors (see below), whose sum is σ = 51045273411840. Its totient is φ = 5529904618368.

The previous prime is 21003003120181. The next prime is 21003003120287. The reversal of 21003003120210 is 1202130030012.

It is a super-2 number, since 2×21003003120210² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21003003120210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4431010947 + ... + 4431015686.

It is an arithmetic number, because the mean of its divisors is an integer number (1595164794120).

Almost surely, 2^{21003003120210} is an apocalyptic number.

21003003120210 is an abundant number, since it is smaller than the sum of its proper divisors (30042270291630).

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

21003003120210 is a wasteful number, since it uses less digits than its factorization.

21003003120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8862026722.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21003003120210 its reverse (1202130030012), we get a palindrome (22205133150222).

The spelling of 21003003120210 in words is "twenty-one trillion, three billion, three million, one hundred twenty thousand, two hundred ten".