21100021120201 has 32 divisors (see below), whose sum is σ = 23566540930560. Its totient is φ = 18774071721216.

The previous prime is 21100021120183. The next prime is 21100021120207. The reversal of 21100021120201 is 10202112000112.

It is a cyclic number.

It is not a de Polignac number, because 21100021120201 - 2¹¹ = 21100021118153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100021120207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 608631270 + ... + 608665936.

It is an arithmetic number, because the mean of its divisors is an integer number (736454404080).

Almost surely, 2^{21100021120201} is an apocalyptic number.

It is an amenable number.

21100021120201 is a deficient number, since it is larger than the sum of its proper divisors (2466519810359).

21100021120201 is a wasteful number, since it uses less digits than its factorization.

21100021120201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38613.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21100021120201 its reverse (10202112000112), we get a palindrome (31302133120313).

The spelling of 21100021120201 in words is "twenty-one trillion, one hundred billion, twenty-one million, one hundred twenty thousand, two hundred one".