11001220111020 has 48 divisors (see below), whose sum is σ = 30803585315328. Its totient is φ = 2933642600640.

The previous prime is 11001220111001. The next prime is 11001220111093. The reversal of 11001220111020 is 2011102210011.

It is a super-2 number, since 2×11001220111020² (a number of 27 digits) contains 22 as substring.

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 = 11001220110987 and 11001220111005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13961775 + ... + 14728665.

It is an arithmetic number, because the mean of its divisors is an integer number (641741360736).

Almost surely, 2^{11001220111020} is an apocalyptic number.

11001220111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11001220111020 is an abundant number, since it is smaller than the sum of its proper divisors (19802365204308).

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

11001220111020 is a wasteful number, since it uses less digits than its factorization.

11001220111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005990 (or 1005988 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11001220111020 its reverse (2011102210011), we get a palindrome (13012322321031).

The spelling of 11001220111020 in words is "eleven trillion, one billion, two hundred twenty million, one hundred eleven thousand, twenty".