21200010102011 has 16 divisors (see below), whose sum is σ = 24044581307040. Its totient is φ = 18529883170560.

The previous prime is 21200010101947. The next prime is 21200010102023. The reversal of 21200010102011 is 11020101000212.

It is a cyclic number.

It is not a de Polignac number, because 21200010102011 - 2⁶ = 21200010101947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21200010101983 and 21200010102001.

It is not an unprimeable number, because it can be changed into a prime (21200010102511) 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, 21263810 + ... + 22238471.

It is an arithmetic number, because the mean of its divisors is an integer number (1502786331690).

Almost surely, 2^{21200010102011} is an apocalyptic number.

21200010102011 is a deficient number, since it is larger than the sum of its proper divisors (2844571205029).

21200010102011 is a wasteful number, since it uses less digits than its factorization.

21200010102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43504286.

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

Adding to 21200010102011 its reverse (11020101000212), we get a palindrome (32220111102223).

The spelling of 21200010102011 in words is "twenty-one trillion, two hundred billion, ten million, one hundred two thousand, eleven".