1100103221 has 4 divisors (see below), whose sum is σ = 1257260832. Its totient is φ = 942945612.

The previous prime is 1100103187. The next prime is 1100103233. The reversal of 1100103221 is 1223010011.

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: 1223010011 = 29 ⋅42172759.

It is not a de Polignac number, because 1100103221 - 2¹⁸ = 1099841077 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 (1100103241) 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, 78578795 + ... + 78578808.

It is an arithmetic number, because the mean of its divisors is an integer number (314315208).

Almost surely, 2^1100103221 is an apocalyptic number.

It is an amenable number.

1100103221 is a deficient number, since it is larger than the sum of its proper divisors (157157611).

1100103221 is an equidigital number, since it uses as much as digits as its factorization.

1100103221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157157610.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1100103221 is about 33167.8039821752. The cubic root of 1100103221 is about 1032.3124032300.

Adding to 1100103221 its reverse (1223010011), we get a palindrome (2323113232).

The spelling of 1100103221 in words is "one billion, one hundred million, one hundred three thousand, two hundred twenty-one".