10002011200021 has 4 divisors (see below), whose sum is σ = 10003021412044. Its totient is φ = 10001000988000.

The previous prime is 10002011199989. The next prime is 10002011200031. The reversal of 10002011200021 is 12000211020001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7643372562225 + 2358638637796 = 2764665^2 + 1535786^2 .

It is a cyclic number.

It is not a de Polignac number, because 10002011200021 - 2⁵ = 10002011199989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10002011199980 and 10002011200007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002011200031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505091160 + ... + 505110961.

It is an arithmetic number, because the mean of its divisors is an integer number (2500755353011).

Almost surely, 2^{10002011200021} is an apocalyptic number.

It is an amenable number.

10002011200021 is a deficient number, since it is larger than the sum of its proper divisors (1010212023).

10002011200021 is an equidigital number, since it uses as much as digits as its factorization.

10002011200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010212022.

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

Adding to 10002011200021 its reverse (12000211020001), we get a palindrome (22002222220022).

The spelling of 10002011200021 in words is "ten trillion, two billion, eleven million, two hundred thousand, twenty-one".