11311110231220 has 24 divisors (see below), whose sum is σ = 23753506657608. Its totient is φ = 4524410726400.

The previous prime is 11311110231203. The next prime is 11311110231221. The reversal of 11311110231220 is 2213201111311.

It can be written as a sum of positive squares in 4 ways, for example, as 44037861904 + 11267072369316 = 209852^2 + 3356646^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311110231221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791200 + ... + 4821640.

It is an arithmetic number, because the mean of its divisors is an integer number (989729444067).

Almost surely, 2^{11311110231220} is an apocalyptic number.

11311110231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311110231220 is an abundant number, since it is smaller than the sum of its proper divisors (12442396426388).

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

11311110231220 is a wasteful number, since it uses less digits than its factorization.

11311110231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170771 (or 4170769 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 11311110231220 its reverse (2213201111311), we get a palindrome (13524311342531).

The spelling of 11311110231220 in words is "eleven trillion, three hundred eleven billion, one hundred ten million, two hundred thirty-one thousand, two hundred twenty".