1100000221 has 4 divisors (see below), whose sum is σ = 1104382944. Its totient is φ = 1095617500.

The previous prime is 1100000203. The next prime is 1100000227. The reversal of 1100000221 is 1220000011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1220000011 = 3571 ⋅341641.

It is a cyclic number.

It is not a de Polignac number, because 1100000221 - 2²¹ = 1097903069 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 (1100000227) 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, 2190985 + ... + 2191486.

It is an arithmetic number, because the mean of its divisors is an integer number (276095736).

Almost surely, 2^1100000221 is an apocalyptic number.

It is an amenable number.

1100000221 is a deficient number, since it is larger than the sum of its proper divisors (4382723).

1100000221 is an equidigital number, since it uses as much as digits as its factorization.

1100000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4382722.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1100000221 is about 33166.2512352542. The cubic root of 1100000221 is about 1032.2801845878.

Adding to 1100000221 its reverse (1220000011), we get a palindrome (2320000232).

The spelling of 1100000221 in words is "one billion, one hundred million, two hundred twenty-one", and thus it is an aban number.