1103103011220 has 192 divisors, whose sum is σ = 3543771119616. Its totient is φ = 251150353920.

The previous prime is 1103103011207. The next prime is 1103103011233. The reversal of 1103103011220 is 221103013011.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1103103011207) and next prime (1103103011233).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1103103011220.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 307869549 + ... + 307873131.

It is an arithmetic number, because the mean of its divisors is an integer number (18457141248).

Almost surely, 2^{1103103011220} is an apocalyptic number.

1103103011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1103103011220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1771885559808).

1103103011220 is an abundant number, since it is smaller than the sum of its proper divisors (2440668108396).

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

1103103011220 is a wasteful number, since it uses less digits than its factorization.

1103103011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6270 (or 6268 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1103103011220 its reverse (221103013011), we get a palindrome (1324206024231).

The spelling of 1103103011220 in words is "one trillion, one hundred three billion, one hundred three million, eleven thousand, two hundred twenty".