211231023312 has 80 divisors (see below), whose sum is σ = 560752012352. Its totient is φ = 68467783680.

The previous prime is 211231023271. The next prime is 211231023317. The reversal of 211231023312 is 213320132112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211231023317) 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, 3122487 + ... + 3189417.

Almost surely, 2^211231023312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211231023312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280376006176).

211231023312 is an abundant number, since it is smaller than the sum of its proper divisors (349520989040).

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

211231023312 is a wasteful number, since it uses less digits than its factorization.

211231023312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68756 (or 68750 counting only the distinct ones).

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

Adding to 211231023312 its reverse (213320132112), we get a palindrome (424551155424).

The spelling of 211231023312 in words is "two hundred eleven billion, two hundred thirty-one million, twenty-three thousand, three hundred twelve".