1100121200020 has 24 divisors (see below), whose sum is σ = 2310734326824. Its totient is φ = 439957088256.

The previous prime is 1100121199967. The next prime is 1100121200027. The reversal of 1100121200020 is 200021210011.

It can be written as a sum of positive squares in 4 ways, for example, as 2483626896 + 1097637573124 = 49836^2 + 1047682^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100121200027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5613237 + ... + 5805916.

It is an arithmetic number, because the mean of its divisors is an integer number (96280596951).

Almost surely, 2^{1100121200020} is an apocalyptic number.

1100121200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100121200020 is an abundant number, since it is smaller than the sum of its proper divisors (1210613126804).

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

1100121200020 is a wasteful number, since it uses less digits than its factorization.

1100121200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11423979 (or 11423977 counting only the distinct ones).

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

Adding to 1100121200020 its reverse (200021210011), we get a palindrome (1300142410031).

Subtracting from 1100121200020 its reverse (200021210011), we obtain a palindrome (900099990009).

The spelling of 1100121200020 in words is "one trillion, one hundred billion, one hundred twenty-one million, two hundred thousand, twenty".