211231131030200 has 96 divisors (see below), whose sum is σ = 498423610045200. Its totient is φ = 83237320258560.

The previous prime is 211231131030167. The next prime is 211231131030203. The reversal of 211231131030200 is 2030131132112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211231131030203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3973211 + ... + 20934389.

Almost surely, 2^{211231131030200} is an apocalyptic number.

211231131030200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211231131030200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249211805022600).

211231131030200 is an abundant number, since it is smaller than the sum of its proper divisors (287192479015000).

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

211231131030200 is a wasteful number, since it uses less digits than its factorization.

211231131030200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16962121 (or 16962112 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 211231131030200 its reverse (2030131132112), we get a palindrome (213261262162312).

The spelling of 211231131030200 in words is "two hundred eleven trillion, two hundred thirty-one billion, one hundred thirty-one million, thirty thousand, two hundred".