20210111102201 has 2 divisors, whose sum is σ = 20210111102202. Its totient is φ = 20210111102200.

The previous prime is 20210111102183. The next prime is 20210111102213. The reversal of 20210111102201 is 10220111101202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19444969026025 + 765142076176 = 4409645^2 + 874724^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210111102201 - 2¹⁰ = 20210111101177 is a prime.

It is not a weakly prime, because it can be changed into another prime (20210111102221) 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 as a sum of consecutive naturals, namely, 10105055551100 + 10105055551101.

It is an arithmetic number, because the mean of its divisors is an integer number (10105055551101).

Almost surely, 2^{20210111102201} is an apocalyptic number.

It is an amenable number.

20210111102201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210111102201 is an equidigital number, since it uses as much as digits as its factorization.

20210111102201 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20210111102201 its reverse (10220111101202), we get a palindrome (30430222203403).

Subtracting from 20210111102201 its reverse (10220111101202), we obtain a palindrome (9990000000999).

The spelling of 20210111102201 in words is "twenty trillion, two hundred ten billion, one hundred eleven million, one hundred two thousand, two hundred one".