1100201021020 has 12 divisors (see below), whose sum is σ = 2310422144184. Its totient is φ = 440080408400.

The previous prime is 1100201020993. The next prime is 1100201021021. The reversal of 1100201021020 is 201201020011.

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 = 1100201020988 and 1100201021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100201021021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27505025506 + ... + 27505025545.

It is an arithmetic number, because the mean of its divisors is an integer number (192535178682).

Almost surely, 2^{1100201021020} is an apocalyptic number.

1100201021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100201021020 is an abundant number, since it is smaller than the sum of its proper divisors (1210221123164).

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

1100201021020 is a wasteful number, since it uses less digits than its factorization.

1100201021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55010051060 (or 55010051058 counting only the distinct ones).

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

Adding to 1100201021020 its reverse (201201020011), we get a palindrome (1301402041031).

The spelling of 1100201021020 in words is "one trillion, one hundred billion, two hundred one million, twenty-one thousand, twenty".