1100021100020 has 48 divisors (see below), whose sum is σ = 2333194080336. Its totient is φ = 435600000000.

The previous prime is 1100021099999. The next prime is 1100021100043. The reversal of 1100021100020 is 200011200011.

It can be written as a sum of positive squares in 8 ways, for example, as 37130206864 + 1062890893156 = 192692^2 + 1030966^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1100021099980 and 1100021100007.

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, 19972520 + ... + 20027520.

It is an arithmetic number, because the mean of its divisors is an integer number (48608210007).

Almost surely, 2^{1100021100020} is an apocalyptic number.

1100021100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100021100020 is an abundant number, since it is smaller than the sum of its proper divisors (1233172980316).

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

1100021100020 is a wasteful number, since it uses less digits than its factorization.

1100021100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65012 (or 65010 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1100021100020 its reverse (200011200011), we get a palindrome (1300032300031).

Subtracting from 1100021100020 its reverse (200011200011), we obtain a palindrome (900009900009).

The spelling of 1100021100020 in words is "one trillion, one hundred billion, twenty-one million, one hundred thousand, twenty".