21002000011010 has 8 divisors (see below), whose sum is σ = 37803600019836. Its totient is φ = 8400800004400.

The previous prime is 21002000010997. The next prime is 21002000011019. The reversal of 21002000011010 is 1011000020012.

It can be written as a sum of positive squares in 2 ways, for example, as 19606820905681 + 1395179105329 = 4427959^2 + 1181177^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21002000011019) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1050100000541 + ... + 1050100000560.

Almost surely, 2^{21002000011010} is an apocalyptic number.

21002000011010 is a deficient number, since it is larger than the sum of its proper divisors (16801600008826).

21002000011010 is a wasteful number, since it uses less digits than its factorization.

21002000011010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100200001108.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21002000011010 its reverse (1011000020012), we get a palindrome (22013000031022).

The spelling of 21002000011010 in words is "twenty-one trillion, two billion, eleven thousand, ten".