1220000020120 has 128 divisors (see below), whose sum is σ = 3169263542400. Its totient is φ = 414046348800.

The previous prime is 1220000020097. The next prime is 1220000020121. The reversal of 1220000020120 is 210200000221.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1220000020097 and 1220000020106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220000020121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288482166 + ... + 288486394.

It is an arithmetic number, because the mean of its divisors is an integer number (24759871425).

Almost surely, 2^{1220000020120} is an apocalyptic number.

1220000020120 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 1220000020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1584631771200).

1220000020120 is an abundant number, since it is smaller than the sum of its proper divisors (1949263522280).

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

1220000020120 is an frugal number, since it uses more digits than its factorization.

1220000020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4550 (or 4344 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1220000020120 its reverse (210200000221), we get a palindrome (1430200020341).

It can be divided in two parts, 12200000201 and 20, that added together give a palindrome (12200000221).

The spelling of 1220000020120 in words is "one trillion, two hundred twenty billion, twenty thousand, one hundred twenty".