21100112210201 has 2 divisors, whose sum is σ = 21100112210202. Its totient is φ = 21100112210200.

The previous prime is 21100112210167. The next prime is 21100112210251. The reversal of 21100112210201 is 10201221100112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12534071041801 + 8566041168400 = 3540349^2 + 2926780^2 .

It is a cyclic number.

It is not a de Polignac number, because 21100112210201 - 2⁶ = 21100112210137 is a prime.

It is not a weakly prime, because it can be changed into another prime (21100112210251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550056105100 + 10550056105101.

It is an arithmetic number, because the mean of its divisors is an integer number (10550056105101).

Almost surely, 2^{21100112210201} is an apocalyptic number.

It is an amenable number.

21100112210201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100112210201 is an equidigital number, since it uses as much as digits as its factorization.

21100112210201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21100112210201 its reverse (10201221100112), we get a palindrome (31301333310313).

The spelling of 21100112210201 in words is "twenty-one trillion, one hundred billion, one hundred twelve million, two hundred ten thousand, two hundred one".