1100002221 has 32 divisors (see below), whose sum is σ = 1765653120. Its totient is φ = 674134272.

The previous prime is 1100002177. The next prime is 1100002261. The reversal of 1100002221 is 1222000011.

It is not a de Polignac number, because 1100002221 - 2¹⁹ = 1099477933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100002261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8130 + ... + 47603.

It is an arithmetic number, because the mean of its divisors is an integer number (55176660).

Almost surely, 2^1100002221 is an apocalyptic number.

It is an amenable number.

1100002221 is a deficient number, since it is larger than the sum of its proper divisors (665650899).

1100002221 is a wasteful number, since it uses less digits than its factorization.

1100002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55802 (or 55796 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1100002221 is about 33166.2813863719. The cubic root of 1100002221 is about 1032.2808102117.

Adding to 1100002221 its reverse (1222000011), we get a palindrome (2322002232).

The spelling of 1100002221 in words is "one billion, one hundred million, two thousand, two hundred twenty-one".