21200000210011 has 16 divisors (see below), whose sum is σ = 25761119800320. Its totient is φ = 17030962488960.

The previous prime is 21200000209837. The next prime is 21200000210017. The reversal of 21200000210011 is 11001200000212.

It is a de Polignac number, because none of the positive numbers 2^k-21200000210011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21200000210011.

It is not an unprimeable number, because it can be changed into a prime (21200000210017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372672945 + ... + 372729826.

It is an arithmetic number, because the mean of its divisors is an integer number (1610069987520).

Almost surely, 2^{21200000210011} is an apocalyptic number.

21200000210011 is a deficient number, since it is larger than the sum of its proper divisors (4561119590309).

21200000210011 is a wasteful number, since it uses less digits than its factorization.

21200000210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745403034.

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

Adding to 21200000210011 its reverse (11001200000212), we get a palindrome (32201200210223).

The spelling of 21200000210011 in words is "twenty-one trillion, two hundred billion, two hundred ten thousand, eleven".