1101220000000 has 144 divisors (see below), whose sum is σ = 2747715817392. Its totient is φ = 440480000000.

The previous prime is 1101219999961. The next prime is 1101220000081. The reversal of 1101220000000 is 221011.

It can be written as a sum of positive squares in 8 ways, for example, as 833028591616 + 268191408384 = 912704^2 + 517872^2 .

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, 19972470 + ... + 20027530.

It is an arithmetic number, because the mean of its divisors is an integer number (19081359843).

Almost surely, 2^{1101220000000} is an apocalyptic number.

1101220000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101220000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1373857908696).

1101220000000 is an abundant number, since it is smaller than the sum of its proper divisors (1646495817392).

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

1101220000000 is an frugal number, since it uses more digits than its factorization.

1101220000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55112 (or 55068 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 1101220000000 its reverse (221011), we get a palindrome (1101220221011).

The spelling of 1101220000000 in words is "one trillion, one hundred one billion, two hundred twenty million", and thus it is an aban number.