201010101102221 has 4 divisors (see below), whose sum is σ = 201474327664092. Its totient is φ = 200545874540352.

The previous prime is 201010101102179. The next prime is 201010101102229. The reversal of 201010101102221 is 122201101010102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126360328302121 + 74649772800100 = 11241011^2 + 8640010^2 .

It is a cyclic number.

It is not a de Polignac number, because 201010101102221 - 2³⁰ = 201009027360397 is a prime.

It is a super-2 number, since 2×201010101102221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201010101102196 and 201010101102205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201010101102229) 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, 232113280286 + ... + 232113281151.

It is an arithmetic number, because the mean of its divisors is an integer number (50368581916023).

Almost surely, 2^{201010101102221} is an apocalyptic number.

It is an amenable number.

201010101102221 is a deficient number, since it is larger than the sum of its proper divisors (464226561871).

201010101102221 is an equidigital number, since it uses as much as digits as its factorization.

201010101102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464226561870.

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

Adding to 201010101102221 its reverse (122201101010102), we get a palindrome (323211202112323).

The spelling of 201010101102221 in words is "two hundred one trillion, ten billion, one hundred one million, one hundred two thousand, two hundred twenty-one".