11021312001220 has 48 divisors (see below), whose sum is σ = 24507168195888. Its totient is φ = 4149037813760.

The previous prime is 11021312001163. The next prime is 11021312001221. The reversal of 11021312001220 is 2210021312011.

It can be written as a sum of positive squares in 8 ways, for example, as 2042887055616 + 8978424945604 = 1429296^2 + 2996402^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11021312001194 and 11021312001203.

It is not an unprimeable number, because it can be changed into a prime (11021312001221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8272290 + ... + 9511750.

It is an arithmetic number, because the mean of its divisors is an integer number (510566004081).

Almost surely, 2^{11021312001220} is an apocalyptic number.

11021312001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11021312001220 is an abundant number, since it is smaller than the sum of its proper divisors (13485856194668).

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

11021312001220 is a wasteful number, since it uses less digits than its factorization.

11021312001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265640 (or 1265638 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11021312001220 its reverse (2210021312011), we get a palindrome (13231333313231).

The spelling of 11021312001220 in words is "eleven trillion, twenty-one billion, three hundred twelve million, one thousand, two hundred twenty".