1220221111120 has 40 divisors (see below), whose sum is σ = 3094924456800. Its totient is φ = 443716767360.

The previous prime is 1220221111097. The next prime is 1220221111133. The reversal of 1220221111120 is 211111220221.

It is a tau number, because it is divible by the number of its divisors (40).

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 = 1220221111094 and 1220221111103.

It is a congruent number.

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, 693306570 + ... + 693308329.

It is an arithmetic number, because the mean of its divisors is an integer number (77373111420).

Almost surely, 2^{1220221111120} is an apocalyptic number.

1220221111120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220221111120 is an abundant number, since it is smaller than the sum of its proper divisors (1874703345680).

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

1220221111120 is a wasteful number, since it uses less digits than its factorization.

1220221111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386614923 (or 1386614917 counting only the distinct ones).

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

Adding to 1220221111120 its reverse (211111220221), we get a palindrome (1431332331341).

The spelling of 1220221111120 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, one hundred eleven thousand, one hundred twenty".