21000020200211 has 16 divisors (see below), whose sum is σ = 22911314697600. Its totient is φ = 19131204837888.

The previous prime is 21000020200193. The next prime is 21000020200217. The reversal of 21000020200211 is 11200202000012.

It is a happy number.

It is not a de Polignac number, because 21000020200211 - 2¹⁰ = 21000020199187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000020200192 and 21000020200201.

It is not an unprimeable number, because it can be changed into a prime (21000020200217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1860026 + ... + 6742383.

It is an arithmetic number, because the mean of its divisors is an integer number (1431957168600).

Almost surely, 2^{21000020200211} is an apocalyptic number.

21000020200211 is a deficient number, since it is larger than the sum of its proper divisors (1911294497389).

21000020200211 is a wasteful number, since it uses less digits than its factorization.

21000020200211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8604878.

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

Adding to 21000020200211 its reverse (11200202000012), we get a palindrome (32200222200223).

The spelling of 21000020200211 in words is "twenty-one trillion, twenty million, two hundred thousand, two hundred eleven".