21002011100201 has 16 divisors (see below), whose sum is σ = 21110133914496. Its totient is φ = 20894257264896.

The previous prime is 21002011100167. The next prime is 21002011100227. The reversal of 21002011100201 is 10200111020012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002011100201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002011106201) 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, 202468916 + ... + 202572618.

It is an arithmetic number, because the mean of its divisors is an integer number (1319383369656).

Almost surely, 2^{21002011100201} is an apocalyptic number.

It is an amenable number.

21002011100201 is a deficient number, since it is larger than the sum of its proper divisors (108122814295).

21002011100201 is a wasteful number, since it uses less digits than its factorization.

21002011100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105472.

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

Adding to 21002011100201 its reverse (10200111020012), we get a palindrome (31202122120213).

The spelling of 21002011100201 in words is "twenty-one trillion, two billion, eleven million, one hundred thousand, two hundred one".