211131320340 has 48 divisors (see below), whose sum is σ = 591225768000. Its totient is φ = 56296154880.

The previous prime is 211131320333. The next prime is 211131320341. The reversal of 211131320340 is 43023131112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211131320341) 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, 462360 + ... + 797520.

It is an arithmetic number, because the mean of its divisors is an integer number (12317203500).

Almost surely, 2^211131320340 is an apocalyptic number.

211131320340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211131320340 is an abundant number, since it is smaller than the sum of its proper divisors (380094447660).

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

211131320340 is a wasteful number, since it uses less digits than its factorization.

211131320340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345672 (or 345670 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 211131320340 its reverse (43023131112), we get a palindrome (254154451452).

The spelling of 211131320340 in words is "two hundred eleven billion, one hundred thirty-one million, three hundred twenty thousand, three hundred forty".