212331212 has 6 divisors (see below), whose sum is σ = 371579628. Its totient is φ = 106165604.

The previous prime is 212331211. The next prime is 212331233. The reversal of 212331212 is 212133212.

It is not an unprimeable number, because it can be changed into a prime (212331211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26541398 + ... + 26541405.

It is an arithmetic number, because the mean of its divisors is an integer number (61929938).

Almost surely, 2^212331212 is an apocalyptic number.

It is an amenable number.

212331212 is a deficient number, since it is larger than the sum of its proper divisors (159248416).

212331212 is a wasteful number, since it uses less digits than its factorization.

212331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53082807 (or 53082805 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 212331212 is about 14571.5892063975. The cubic root of 212331212 is about 596.5835575320.

Adding to 212331212 its reverse (212133212), we get a palindrome (424464424).

The spelling of 212331212 in words is "two hundred twelve million, three hundred thirty-one thousand, two hundred twelve".