10201100221 has 4 divisors (see below), whose sum is σ = 10985800252. Its totient is φ = 9416400192.

The previous prime is 10201100213. The next prime is 10201100237. The reversal of 10201100221 is 12200110201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12200110201 = 113 ⋅107965577.

It can be written as a sum of positive squares in 2 ways, for example, as 5578596100 + 4622504121 = 74690^2 + 67989^2 .

It is a cyclic number.

It is not a de Polignac number, because 10201100221 - 2³ = 10201100213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10201100198 and 10201100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10201100251) 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, 392349996 + ... + 392350021.

It is an arithmetic number, because the mean of its divisors is an integer number (2746450063).

Almost surely, 2^10201100221 is an apocalyptic number.

It is an amenable number.

10201100221 is a deficient number, since it is larger than the sum of its proper divisors (784700031).

10201100221 is an equidigital number, since it uses as much as digits as its factorization.

10201100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784700030.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10201100221 its reverse (12200110201), we get a palindrome (22401210422).

The spelling of 10201100221 in words is "ten billion, two hundred one million, one hundred thousand, two hundred twenty-one".