11001220120 has 64 divisors (see below), whose sum is σ = 27014148000. Its totient is φ = 3998791680.

The previous prime is 11001220073. The next prime is 11001220127. The reversal of 11001220120 is 2102210011.

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 = 11001220097 and 11001220106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001220127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1702656 + ... + 1709104.

Almost surely, 2^11001220120 is an apocalyptic number.

11001220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11001220120 is an abundant number, since it is smaller than the sum of its proper divisors (16012927880).

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

11001220120 is a wasteful number, since it uses less digits than its factorization.

11001220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10348 (or 10344 counting only the distinct ones).

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

Adding to 11001220120 its reverse (2102210011), we get a palindrome (13103430131).

The spelling of 11001220120 in words is "eleven billion, one million, two hundred twenty thousand, one hundred twenty".