21210001200011 has 16 divisors (see below), whose sum is σ = 23322777158016. Its totient is φ = 19167569156736.

The previous prime is 21210001199993. The next prime is 21210001200029. The reversal of 21210001200011 is 11000210001212.

It is an interprime number because it is at equal distance from previous prime (21210001199993) and next prime (21210001200029).

It is not a de Polignac number, because 21210001200011 - 2¹⁰ = 21210001198987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21210001199965 and 21210001200001.

It is not an unprimeable number, because it can be changed into a prime (21210001200061) 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, 32924780 + ... + 33562793.

It is an arithmetic number, because the mean of its divisors is an integer number (1457673572376).

Almost surely, 2^{21210001200011} is an apocalyptic number.

21210001200011 is a deficient number, since it is larger than the sum of its proper divisors (2112775958005).

21210001200011 is a wasteful number, since it uses less digits than its factorization.

21210001200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66488102.

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

Adding to 21210001200011 its reverse (11000210001212), we get a palindrome (32210211201223).

The spelling of 21210001200011 in words is "twenty-one trillion, two hundred ten billion, one million, two hundred thousand, eleven".