212711212 has 48 divisors (see below), whose sum is σ = 441262080. Its totient is φ = 87796800.

The previous prime is 212711197. The next prime is 212711227. The reversal of 212711212 is 212117212.

It is an interprime number because it is at equal distance from previous prime (212711197) and next prime (212711227).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 212711212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233037 + ... + 233947.

It is an arithmetic number, because the mean of its divisors is an integer number (9192960).

Almost surely, 2^212711212 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 212711212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220631040).

212711212 is an abundant number, since it is smaller than the sum of its proper divisors (228550868).

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

212711212 is a wasteful number, since it uses less digits than its factorization.

212711212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222 (or 1220 counting only the distinct ones).

The product of its digits is 112, while the sum is 19.

The square root of 212711212 is about 14584.6224496899. The cubic root of 212711212 is about 596.9392387098.

Adding to 212711212 its reverse (212117212), we get a palindrome (424828424).

The spelling of 212711212 in words is "two hundred twelve million, seven hundred eleven thousand, two hundred twelve".