21111010200001 has 16 divisors (see below), whose sum is σ = 21487105543680. Its totient is φ = 20737112880960.

The previous prime is 21111010199963. The next prime is 21111010200013. The reversal of 21111010200001 is 10000201011112.

It is a cyclic number.

It is not a de Polignac number, because 21111010200001 - 2³¹ = 21108862716353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21111010204001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 395614360 + ... + 395667718.

It is an arithmetic number, because the mean of its divisors is an integer number (1342944096480).

Almost surely, 2^{21111010200001} is an apocalyptic number.

It is an amenable number.

21111010200001 is a deficient number, since it is larger than the sum of its proper divisors (376095343679).

21111010200001 is a wasteful number, since it uses less digits than its factorization.

21111010200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73824.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21111010200001 its reverse (10000201011112), we get a palindrome (31111211211113).

The spelling of 21111010200001 in words is "twenty-one trillion, one hundred eleven billion, ten million, two hundred thousand, one".