211301431131220 has 12 divisors (see below), whose sum is σ = 443733005375604. Its totient is φ = 84520572452480.

The previous prime is 211301431131191. The next prime is 211301431131253. The reversal of 211301431131220 is 22131134103112.

It can be written as a sum of positive squares in 2 ways, for example, as 111012943367824 + 100288487763396 = 10536268^2 + 10014414^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5282535778261 + ... + 5282535778300.

It is an arithmetic number, because the mean of its divisors is an integer number (36977750447967).

Almost surely, 2^{211301431131220} is an apocalyptic number.

211301431131220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211301431131220 is an abundant number, since it is smaller than the sum of its proper divisors (232431574244384).

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

211301431131220 is a wasteful number, since it uses less digits than its factorization.

211301431131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10565071556570 (or 10565071556568 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 211301431131220 its reverse (22131134103112), we get a palindrome (233432565234332).

The spelling of 211301431131220 in words is "two hundred eleven trillion, three hundred one billion, four hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty".