12311210535220 has 12 divisors (see below), whose sum is σ = 25853542124004. Its totient is φ = 4924484214080.

The previous prime is 12311210535181. The next prime is 12311210535223. The reversal of 12311210535220 is 2253501211321.

It can be written as a sum of positive squares in 2 ways, for example, as 6550845729444 + 5760364805776 = 2559462^2 + 2400076^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311210535223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307780263361 + ... + 307780263400.

It is an arithmetic number, because the mean of its divisors is an integer number (2154461843667).

Almost surely, 2^{12311210535220} is an apocalyptic number.

12311210535220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311210535220 is an abundant number, since it is smaller than the sum of its proper divisors (13542331588784).

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

12311210535220 is a wasteful number, since it uses less digits than its factorization.

12311210535220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615560526770 (or 615560526768 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 12311210535220 its reverse (2253501211321), we get a palindrome (14564711746541).

The spelling of 12311210535220 in words is "twelve trillion, three hundred eleven billion, two hundred ten million, five hundred thirty-five thousand, two hundred twenty".