21100012210201 has 4 divisors (see below), whose sum is σ = 21100858164352. Its totient is φ = 21099166256052.

The previous prime is 21100012210153. The next prime is 21100012210271. The reversal of 21100012210201 is 10201221000112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21100012210201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100012210271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422939661 + ... + 422989546.

It is an arithmetic number, because the mean of its divisors is an integer number (5275214541088).

Almost surely, 2^{21100012210201} is an apocalyptic number.

It is an amenable number.

21100012210201 is a deficient number, since it is larger than the sum of its proper divisors (845954151).

21100012210201 is an equidigital number, since it uses as much as digits as its factorization.

21100012210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845954150.

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

Adding to 21100012210201 its reverse (10201221000112), we get a palindrome (31301233210313).

The spelling of 21100012210201 in words is "twenty-one trillion, one hundred billion, twelve million, two hundred ten thousand, two hundred one".