1102002221 has 4 divisors (see below), whose sum is σ = 1102080252. Its totient is φ = 1101924192.

The previous prime is 1102002193. The next prime is 1102002227. The reversal of 1102002221 is 1222002011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1222002011 = 2927 ⋅417493.

It can be written as a sum of positive squares in 2 ways, for example, as 85285225 + 1016716996 = 9235^2 + 31886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1102002221 - 2⁶ = 1102002157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102002227) 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, 11240 + ... + 48273.

It is an arithmetic number, because the mean of its divisors is an integer number (275520063).

Almost surely, 2^1102002221 is an apocalyptic number.

It is an amenable number.

1102002221 is a deficient number, since it is larger than the sum of its proper divisors (78031).

1102002221 is an equidigital number, since it uses as much as digits as its factorization.

1102002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78030.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1102002221 is about 33196.4187978161. The cubic root of 1102002221 is about 1032.9060548995.

Adding to 1102002221 its reverse (1222002011), we get a palindrome (2324004232).

The spelling of 1102002221 in words is "one billion, one hundred two million, two thousand, two hundred twenty-one".