20110100221201 has 2 divisors, whose sum is σ = 20110100221202. Its totient is φ = 20110100221200.

The previous prime is 20110100221187. The next prime is 20110100221261. The reversal of 20110100221201 is 10212200101102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14081106150400 + 6028994070801 = 3752480^2 + 2455401^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110100221201 - 2¹⁹ = 20110099696913 is a prime.

It is a super-2 number, since 2×20110100221201² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20110100221261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055050110600 + 10055050110601.

It is an arithmetic number, because the mean of its divisors is an integer number (10055050110601).

Almost surely, 2^{20110100221201} is an apocalyptic number.

It is an amenable number.

20110100221201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110100221201 is an equidigital number, since it uses as much as digits as its factorization.

20110100221201 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 13.

Adding to 20110100221201 its reverse (10212200101102), we get a palindrome (30322300322303).

The spelling of 20110100221201 in words is "twenty trillion, one hundred ten billion, one hundred million, two hundred twenty-one thousand, two hundred one".