21010002021010 has 16 divisors (see below), whose sum is σ = 38273642237376. Its totient is φ = 8302747786288.

The previous prime is 21010002020929. The next prime is 21010002021011. The reversal of 21010002021010 is 1012020001012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (21010002021011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12656626894 + ... + 12656628553.

It is an arithmetic number, because the mean of its divisors is an integer number (2392102639836).

Almost surely, 2^{21010002021010} is an apocalyptic number.

21010002021010 is a deficient number, since it is larger than the sum of its proper divisors (17263640216366).

21010002021010 is a wasteful number, since it uses less digits than its factorization.

21010002021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25313255537.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21010002021010 its reverse (1012020001012), we get a palindrome (22022022022022).

The spelling of 21010002021010 in words is "twenty-one trillion, ten billion, two million, twenty-one thousand, ten".