21020200200011 has 2 divisors, whose sum is σ = 21020200200012. Its totient is φ = 21020200200010.

The previous prime is 21020200200007. The next prime is 21020200200059. The reversal of 21020200200011 is 11000200202012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21020200200011 - 2² = 21020200200007 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21020200199965 and 21020200200001.

It is not a weakly prime, because it can be changed into another prime (21020203200011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510100100005 + 10510100100006.

It is an arithmetic number, because the mean of its divisors is an integer number (10510100100006).

Almost surely, 2^{21020200200011} is an apocalyptic number.

21020200200011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020200200011 is an equidigital number, since it uses as much as digits as its factorization.

21020200200011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21020200200011 its reverse (11000200202012), we get a palindrome (32020400402023).

The spelling of 21020200200011 in words is "twenty-one trillion, twenty billion, two hundred million, two hundred thousand, eleven".