1221103060 has 12 divisors (see below), whose sum is σ = 2564316468. Its totient is φ = 488441216.

The previous prime is 1221103043. The next prime is 1221103061. The reversal of 1221103060 is 603011221.

It can be written as a sum of positive squares in 2 ways, for example, as 900120004 + 320983056 = 30002^2 + 17916^2 .

It is a super-3 number, since 3×1221103060³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221103061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30527557 + ... + 30527596.

It is an arithmetic number, because the mean of its divisors is an integer number (213693039).

Almost surely, 2^1221103060 is an apocalyptic number.

1221103060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221103060 is an abundant number, since it is smaller than the sum of its proper divisors (1343213408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221103060 is a wasteful number, since it uses less digits than its factorization.

1221103060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61055162 (or 61055160 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1221103060 is about 34944.2850835441. The cubic root of 1221103060 is about 1068.8516693175.

Adding to 1221103060 its reverse (603011221), we get a palindrome (1824114281).

The spelling of 1221103060 in words is "one billion, two hundred twenty-one million, one hundred three thousand, sixty".