1220001111120 has 160 divisors (see below), whose sum is σ = 4128530471424. Its totient is φ = 295563686400.

The previous prime is 1220001111113. The next prime is 1220001111137. The reversal of 1220001111120 is 211111000221.

It is a super-2 number, since 2×1220001111120² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1220001111096 and 1220001111105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3890919 + ... + 4192761.

Almost surely, 2^{1220001111120} is an apocalyptic number.

1220001111120 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 1220001111120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2064265235712).

1220001111120 is an abundant number, since it is smaller than the sum of its proper divisors (2908529360304).

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

1220001111120 is a wasteful number, since it uses less digits than its factorization.

1220001111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303401 (or 303395 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1220001111120 its reverse (211111000221), we get a palindrome (1431112111341).

The spelling of 1220001111120 in words is "one trillion, two hundred twenty billion, one million, one hundred eleven thousand, one hundred twenty".