21001102210010 has 64 divisors (see below), whose sum is σ = 43111317245472. Its totient is φ = 7296970530816.

The previous prime is 21001102210009. The next prime is 21001102210013. The reversal of 21001102210010 is 1001220110012.

It can be written as a sum of positive squares in 16 ways, for example, as 11475095275081 + 9526006934929 = 3387491^2 + 3086423^2 .

It is a super-2 number, since 2×21001102210010² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21001102209973 and 21001102210000.

It is not an unprimeable number, because it can be changed into a prime (21001102210013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13338782 + ... + 14829878.

Almost surely, 2^{21001102210010} is an apocalyptic number.

21001102210010 is an abundant number, since it is smaller than the sum of its proper divisors (22110215035462).

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

21001102210010 is a wasteful number, since it uses less digits than its factorization.

21001102210010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497507.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21001102210010 its reverse (1001220110012), we get a palindrome (22002322320022).

The spelling of 21001102210010 in words is "twenty-one trillion, one billion, one hundred two million, two hundred ten thousand, ten".