1100001220120 has 64 divisors (see below), whose sum is σ = 2703811946400. Its totient is φ = 399436154880.

The previous prime is 1100001220063. The next prime is 1100001220133. The reversal of 1100001220120 is 210221000011.

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 = 1100001220097 and 1100001220106.

It is a congruent number.

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, 1451089 + ... + 2075008.

Almost surely, 2^{1100001220120} is an apocalyptic number.

1100001220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100001220120 is an abundant number, since it is smaller than the sum of its proper divisors (1603810726280).

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

1100001220120 is a wasteful number, since it uses less digits than its factorization.

1100001220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3526828 (or 3526824 counting only the distinct ones).

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

Adding to 1100001220120 its reverse (210221000011), we get a palindrome (1310222220131).

The spelling of 1100001220120 in words is "one trillion, one hundred billion, one million, two hundred twenty thousand, one hundred twenty".