1220120110020 has 48 divisors (see below), whose sum is σ = 3904384353408. Its totient is φ = 278884596480.

The previous prime is 1220120110007. The next prime is 1220120110063. The reversal of 1220120110020 is 200110210221.

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 = 1220120109978 and 1220120110005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1452523521 + ... + 1452524360.

It is an arithmetic number, because the mean of its divisors is an integer number (81341340696).

Almost surely, 2^{1220120110020} is an apocalyptic number.

1220120110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220120110020 is an abundant number, since it is smaller than the sum of its proper divisors (2684264243388).

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

1220120110020 is a wasteful number, since it uses less digits than its factorization.

1220120110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905047900 (or 2905047898 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1220120110020 its reverse (200110210221), we get a palindrome (1420230320241).

It can be divided in two parts, 12201201 and 10020, that added together give a palindrome (12211221).

The spelling of 1220120110020 in words is "one trillion, two hundred twenty billion, one hundred twenty million, one hundred ten thousand, twenty".