21001012200011 has 16 divisors (see below), whose sum is σ = 21995807822400. Its totient is φ = 20013147715968.

The previous prime is 21001012199989. The next prime is 21001012200017. The reversal of 21001012200011 is 11000221010012.

It is not a de Polignac number, because 21001012200011 - 2¹⁰ = 21001012198987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21001012199965 and 21001012200001.

It is not an unprimeable number, because it can be changed into a prime (21001012200017) 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, 6182405 + ... + 8956793.

It is an arithmetic number, because the mean of its divisors is an integer number (1374737988900).

Almost surely, 2^{21001012200011} is an apocalyptic number.

21001012200011 is a deficient number, since it is larger than the sum of its proper divisors (994795622389).

21001012200011 is a wasteful number, since it uses less digits than its factorization.

21001012200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775638.

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

Adding to 21001012200011 its reverse (11000221010012), we get a palindrome (32001233210023).

The spelling of 21001012200011 in words is "twenty-one trillion, one billion, twelve million, two hundred thousand, eleven".