1220221103 has 8 divisors (see below), whose sum is σ = 1234917600. Its totient is φ = 1205568000.

The previous prime is 1220221099. The next prime is 1220221111. The reversal of 1220221103 is 3011220221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220221103 - 2² = 1220221099 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 (1220221153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47603 + ... + 68603.

It is an arithmetic number, because the mean of its divisors is an integer number (154364700).

Almost surely, 2^1220221103 is an apocalyptic number.

1220221103 is a deficient number, since it is larger than the sum of its proper divisors (14696497).

1220221103 is an equidigital number, since it uses as much as digits as its factorization.

1220221103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21697.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1220221103 is about 34931.6633299933. The cubic root of 1220221103 is about 1068.5942768314.

Adding to 1220221103 its reverse (3011220221), we get a palindrome (4231441324).

The spelling of 1220221103 in words is "one billion, two hundred twenty million, two hundred twenty-one thousand, one hundred three".