11011010001220 has 24 divisors (see below), whose sum is σ = 24483304591704. Its totient is φ = 4145321412096.

The previous prime is 11011010001137. The next prime is 11011010001221. The reversal of 11011010001220 is 2210001011011.

It can be written as a sum of positive squares in 4 ways, for example, as 4484170467396 + 6526839533824 = 2117586^2 + 2554768^2 .

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 = 11011010001197 and 11011010001206.

It is not an unprimeable number, because it can be changed into a prime (11011010001221) 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, 16192661427 + ... + 16192662106.

It is an arithmetic number, because the mean of its divisors is an integer number (1020137691321).

Almost surely, 2^{11011010001220} is an apocalyptic number.

11011010001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011010001220 is an abundant number, since it is smaller than the sum of its proper divisors (13472294590484).

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

11011010001220 is a wasteful number, since it uses less digits than its factorization.

11011010001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32385323559 (or 32385323557 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11011010001220 its reverse (2210001011011), we get a palindrome (13221011012231).

The spelling of 11011010001220 in words is "eleven trillion, eleven billion, ten million, one thousand, two hundred twenty".