211430431212 has 192 divisors, whose sum is σ = 691183632384. Its totient is φ = 48488520960.

The previous prime is 211430431169. The next prime is 211430431217. The reversal of 211430431212 is 212134034112.

It is not an unprimeable number, because it can be changed into a prime (211430431217) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 106368 + ... + 658919.

It is an arithmetic number, because the mean of its divisors is an integer number (3599914752).

Almost surely, 2^211430431212 is an apocalyptic number.

211430431212 is a gapful number since it is divisible by the number (22) 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 211430431212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345591816192).

211430431212 is an abundant number, since it is smaller than the sum of its proper divisors (479753201172).

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

211430431212 is a wasteful number, since it uses less digits than its factorization.

211430431212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765348 (or 765346 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 211430431212 its reverse (212134034112), we get a palindrome (423564465324).

The spelling of 211430431212 in words is "two hundred eleven billion, four hundred thirty million, four hundred thirty-one thousand, two hundred twelve".