211223012 has 96 divisors (see below), whose sum is σ = 503967744. Its totient is φ = 74793600.

The previous prime is 211222997. The next prime is 211223039. The reversal of 211223012 is 210322112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283913 + ... + 284655.

It is an arithmetic number, because the mean of its divisors is an integer number (5249664).

Almost surely, 2^211223012 is an apocalyptic number.

211223012 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 211223012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251983872).

211223012 is an abundant number, since it is smaller than the sum of its proper divisors (292744732).

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

211223012 is a wasteful number, since it uses less digits than its factorization.

211223012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 211223012 is about 14533.5134086703. The cubic root of 211223012 is about 595.5438494323.

Adding to 211223012 its reverse (210322112), we get a palindrome (421545124).

The spelling of 211223012 in words is "two hundred eleven million, two hundred twenty-three thousand, twelve".