1212220111120 has 160 divisors (see below), whose sum is σ = 3144864787200. Its totient is φ = 431850405888.

The previous prime is 1212220111049. The next prime is 1212220111153. The reversal of 1212220111120 is 211110222121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1212220111094 and 1212220111103.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22893636 + ... + 22946524.

It is an arithmetic number, because the mean of its divisors is an integer number (19655404920).

Almost surely, 2^{1212220111120} is an apocalyptic number.

1212220111120 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 1212220111120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1572432393600).

1212220111120 is an abundant number, since it is smaller than the sum of its proper divisors (1932644676080).

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

1212220111120 is a wasteful number, since it uses less digits than its factorization.

1212220111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53825 (or 53819 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212220111120 its reverse (211110222121), we get a palindrome (1423330333241).

The spelling of 1212220111120 in words is "one trillion, two hundred twelve billion, two hundred twenty million, one hundred eleven thousand, one hundred twenty".