1100120012020 has 24 divisors (see below), whose sum is σ = 2311934713704. Its totient is φ = 439727492736.

The previous prime is 1100120012009. The next prime is 1100120012021. The reversal of 1100120012020 is 202100210011.

It can be written as a sum of positive squares in 4 ways, for example, as 334572010084 + 765548001936 = 578422^2 + 874956^2 .

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 = 1100120011988 and 1100120012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100120012021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20003859 + ... + 20058778.

It is an arithmetic number, because the mean of its divisors is an integer number (96330613071).

Almost surely, 2^{1100120012020} is an apocalyptic number.

1100120012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100120012020 is an abundant number, since it is smaller than the sum of its proper divisors (1211814701684).

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

1100120012020 is a wasteful number, since it uses less digits than its factorization.

1100120012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40064019 (or 40064017 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1100120012020 its reverse (202100210011), we get a palindrome (1302220222031).

The spelling of 1100120012020 in words is "one trillion, one hundred billion, one hundred twenty million, twelve thousand, twenty".