10202102221 has 4 divisors (see below), whose sum is σ = 10225664092. Its totient is φ = 10178540352.

The previous prime is 10202102189. The next prime is 10202102227. The reversal of 10202102221 is 12220120201.

It is a happy number.

10202102221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12220120201 = 311 ⋅39292991.

It can be written as a sum of positive squares in 2 ways, for example, as 6787452996 + 3414649225 = 82386^2 + 58435^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202102221 - 2⁵ = 10202102189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202102227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11780286 + ... + 11781151.

It is an arithmetic number, because the mean of its divisors is an integer number (2556416023).

Almost surely, 2^10202102221 is an apocalyptic number.

It is an amenable number.

10202102221 is a deficient number, since it is larger than the sum of its proper divisors (23561871).

10202102221 is an equidigital number, since it uses as much as digits as its factorization.

10202102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23561870.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10202102221 its reverse (12220120201), we get a palindrome (22422222422).

The spelling of 10202102221 in words is "ten billion, two hundred two million, one hundred two thousand, two hundred twenty-one".