1220111101320 has 32 divisors (see below), whose sum is σ = 3660333304320. Its totient is φ = 325362960320.

The previous prime is 1220111101289. The next prime is 1220111101357. The reversal of 1220111101320 is 231011110221.

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 1220111101320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5083796136 + ... + 5083796375.

It is an arithmetic number, because the mean of its divisors is an integer number (114385415760).

Almost surely, 2^{1220111101320} is an apocalyptic number.

1220111101320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220111101320 is an abundant number, since it is smaller than the sum of its proper divisors (2440222203000).

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

1220111101320 is a wasteful number, since it uses less digits than its factorization.

1220111101320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10167592525 (or 10167592521 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1220111101320 its reverse (231011110221), we get a palindrome (1451122211541).

The spelling of 1220111101320 in words is "one trillion, two hundred twenty billion, one hundred eleven million, one hundred one thousand, three hundred twenty".